Celeriac and Kohlrabi: Italian recipes for Two Unusual Vegetables

As the season of spring arrives in Melbourne, I’m still enjoying celeriac and kohlrabi, two unusual vegetables that are still available in September and October at the Queen Victoria Market.

Celeriac and Kohlrabi: Strange-Looking but Delicious

Celeriac and kohlrabi could be described as particularly beautiful. Celeriac is knobbly, tangled and earthy; kohlrabi has a swollen round stem with leaf stalks projecting from it, but these rather inhospitable exteriors are two versatile and delicious vegetables.

Not the prettiest vegetables at the market, but celeriac and kohlrabi reward the cook who looks beyond appearances.

The specimens in my photographs are particularly rugged. A careful grower or more selective retailer might have rejected them before they have reached this  mature end of season stage.

Kohlrabi is best harvested young because large, mature plants can become tough and woody. Celeriac is more forgiving and can grow to a considerable size while remaining perfectly good to eat.

A younger looking kohlrabi as usually sold at the beginning of their season
When Are Celeriac and Kohlrabi in Season?

Celeriac is very much a vegetable of the cooler months and has a long growing season. In the Northern Hemisphere it is generally harvested from autumn through winter and into early spring; in UK, for example, the main season extends roughly from October to March.In Italy kohlrabi grows during two main seasonal cycles: a spring crop from May to June and an autumn-to-winter crop from October to November.

 In the southern part of Australia the seasons are reversed, making celeriac predominantly an autumn and winter vegetable, although local climate and growing conditions can extend its availability.

Kohlrabi is a member of the brassica family. It grows quickly and also prefers cool conditions. When harvested young, its swollen stem is crisp, juicy and mildly sweet, with flavours reminiscent of cabbage stem, broccoli and turnip. It can be eaten raw, steamed, sautéed, roasted, stuffed or added to soups and stews.

In Europe, successive crops can provide young kohlrabi from late spring through autumn and into early winter in milder regions. In temperate parts of the Southern Hemisphere, spring and autumn provide particularly favourable growing conditions but too much heat or dry weather can encourage older specimens to become tough and woody.

Green coloured Kohlrabi sold with substantial amounts of leaves that I bought in Vietnam!

The leaves of kohlrabi are edible too and can be cooked like other leafy brassicas.

A much younger me holding a bunch of leafy Kohlrabi (cavolo rapa) that my relatives in Ragusa use to make with pasta (Causunnedda )

My relatives in Ragusa use them in a delicious, rather soupy pasta dish. I was always intrigued by the kohlrabi they bought there: very leafy, with relatively small swollen stems, and invariably beautifully tender. The violet varieties of kohlrabi are prominent in Italy and eventually they will also be common in Australia.

Kohlrabi in the Market in Syracuse. Bought young has crisp, juicy flesh, but the leaves are valuable too—something Sicilian cooks have long understood.
Versatility of CELERIAC and Kohlrabi

Perhaps because of their uncompromising appearance, celeriac and kohlrabi are easily overlooked, but European cooks have long recognised their value. Both can move comfortably between raw and cooked dishes and take well to strong flavours as well as simple preparations.

They are also suited to preserving. In Central and Eastern European food traditions, firm vegetables have long been preserved in vinegar, brine or through fermentation, sometimes with herbs, mustard seeds and spices. Kohlrabi and celeriac lend themselves particularly well to pickling because of their firm texture and ability to retain some crunch.

I have written about both vegetables before, with recipes and examples of how they are prepared in different parts of Italy. Use the links to see those earlier posts.

Two northern Italian recipes that demonstrate Celeriac and Kohlrabi recipes

Two distinct recipes from Northern Italy are here: a hearty Veronese minestra with celeriac, borlotti beans, sausage, and tagliatelle, and a Trentino–Alto Adige preparation of kohlrabi slowly cooked with butter and cream until tender.

Recipe: Minestra di Sedano Rapa Tagliatelle –Veronese Celeriac, Borlotti Bean and Tagliatelle Soup

This substantial minestra from Verona is made with celeriac, borlotti beans, fresh pork sausage and egg tagliatelle. The celeriac softens during the long cooking and contributes the distinctive celery-like fragrance, while the beans give the soup body and the fresh sausage adds richness.

Grande Enciclopedia Illustrata della Gastronomia

I found this recipe in my 1990 edition of Grande Enciclopedia Illustrata della Gastronomia, where it is attributed to Giovanni Capnist’s La cucina veronese.

The accompanying text written in Italian makes an interesting distinction: although celeriac has essentially the same aroma as ordinary celery, it is not used simply as an aromatic but treated as a vegetable in its own right, both raw and cooked.

This minestra demonstrates that particularly well. Celeriac is not hiding in the background as we do with celery stalks,  it is one of the substantial ingredients around which the dish is built.

Serves 6–8

Ingredients
  • 400 g dried borlotti beans
  • 1 celeriac, about 500–600 g before trimming
  • 1 large onion
  • 1 carrot
  • 4 small fresh pork sausages
  • 1.5 litres beef broth
  • 200 g dried egg tagliatelle
  • Salt and freshly ground black pepper
  • Extra virgin olive oil, to serve — the original suggests olive oil from Lake Garda

METHOD

Soak the borlotti beans overnight, then drain.

Peel and trim the celeriac and cut it into small pieces. Roughly chop the onion and carrot and remove the sausage meat from its casings.

Place the beans, celeriac, onion, carrot and sausage meat in a large saucepan. Add the beef broth and bring gently to a simmer.

Cook over low heat for at least 2 hours, stirring occasionally so that the ingredients do not catch on the bottom of the pan. Season with salt and pepper.

About 20 minutes before the end of cooking, add the dried egg tagliatelle. Continue cooking, stirring occasionally, until the pasta is al dente.

Remove from the heat and allow the minestra to settle and cool slightly before serving. For a thicker consistency, mash some of the tender borlotti beans against the side of the pot and stir them back through the soup.

If desired, finish each serving with a drizzle of extra virgin olive oil*

 An Interesting point: *The original Italian recipe finishes with:

“Servire, condendo se piace con un filo di olio d’oliva del Garda.” – If desired, serve, with a drizzle of  olive oil from Grada.

That reference to Lake Garda olive oil is not an incidental detail. Verona lies just east of Lake Garda, where the moderating influence of the lake has allowed olives to be cultivated unusually far north. A final thread of local olive oil therefore gives the dish an unmistakable local,  geographical connection.

Recipe: Cavolo Rapa Soffocato – An Alto Adige Way with Kohlrabi

I have found versions of this traditional Alto Adige dish in two of my cookery books. In my 1990 Grande Enciclopedia Illustrata della Gastronomia it appears as Cavolo rapa stufato, while Osteria: 1,000 Generous and Simple Recipes from Italy’s Best Local Restaurants, published by Slow Food Editore, calls it Cavolo rapa soffocato – smothered kohlrabi.

Osteria: 1,000 Generous and Simple Recipes from Italy’s Best Local Restaurants,Slow Food Editore

The recipes are essentially the same, but I much prefer the straightforward, simple instructions in Osteria.

What makes the recipe particularly interesting is that it treats kohlrabi quite differently from the crisp vegetable we might expect in a salad or pickle. Here there is no attempt to preserve its crunch. The kohlrabi is deliberately cooked for an hour until very tender, with butter, a little sugar and flour, before being finished with cream. The sugar encourages browning and enhances the vegetable’s natural sweetness, while the flour and cream turn the cooking juices into a light sauce.

It is rich, comforting and distinctly Alpine in character and an excellent example of what northern Italian cooks can do with this rather austere-looking vegetable. The cream and butter are also characteristic of this very northern Italian Cuisine.

The recipe in Osteria is attributed to Klaus Mayr of Renon–Ritten, in Bolzano–Bozen, Trentino–Alto Adige.

I have not made this recipe yet, but although it is a side dish, I rather like the idea of presenting it as a hot dip with warm bread. I doubt very much it the Bolzano crew would be impressed!

Cavolo Rapa Soffocato — Smothered Kohlrabi

Serves 4

Ingredients
  • 6 tablespoons unsalted butter
  • 1 tablespoon sugar
  • 4 kohlrabi, diced
  • 1 tablespoon plain flour
  • Salt and freshly ground black pepper
  • ½ cup cream
Method

Melt the butter in a saucepan and add the sugar. Cook over medium heat, stirring, until the sugar begins to caramelise.

Add the diced kohlrabi, sprinkle with the flour and season with salt and pepper. Cook, stirring so that it does not stick, until the kohlrabi begins to brown.

Add ½ cup cold water, cover and cook over low heat for about 1 hour. Check occasionally and add a little more water if the pan becomes too dry.

Uncover, stir in the cream and cook for a few more minutes, stirring frequently, until the sauce has thickened. Serve warm.

A finishing comment: There is something very appealing about these two recipes sitting together. Celeriac and kohlrabi may be awkward-looking vegetables, but neither is treated timidly in these northern Italian dishes. In Verona, celeriac becomes part of a substantial minestra with beans, sausage and pasta; in Alto Adige, kohlrabi is slowly smothered with butter and cream. Both recipes make a convincing case for looking beyond appearances—and perhaps for giving these vegetables a little more space in our kitchens.

Other recipes on the blog:

UNVEILING KOHLRABI, a BRASSICA

KOHLRABI with pasta (Causunnedda )

KOHLRABI, as eaten in Sicily

Kohlrabi, Fennel, Celeriac and Daikon make a good salad (and other recipes)

A WET PASTA DISH WITH KOHLRABI

KOHLRABI and TENERUMI, shared between cultures of Sicily and Vietnam

SEDANO RAPA (Celeriac and how to eat it) 

I am surprised that there is only one post about celeriac as I use it quite a bit, however you will find a number of different ways to prepare it in the above link

SEDANO RAPA (Celeriac and how to eat it)

What Is Sedano Rapa and how do yOu eat it?

Sedano rapa is celeriac, and whenever I buy one at Melbourne’s Queen Victoria Market, someone invariably asks me: “What do you do with it?”

The same thing happens when I buy cavolo nero, cime di rapa, artichokes and, occasionally, fennel, lthough fennel has now become familiar enough in Australia to attract fewer puzzled looks.

Celeriac is certainly not a beautiful vegetable at first sight. Knobbly, rough-skinned and often trailing roots, it looks rather unpromising. But underneath that rugged exterior is dense, creamy-white flesh with a fresh celery fragrance and a flavour that is earthy, slightly nutty and much more delicate than its appearance suggests.

It is also remarkably versatile. Celeriac can be eaten raw or cooked, boiled, mashed, roasted or turned into soup. In Italy, sedano rapa is particularly associated with the north, although, as I discovered through my own family, it was certainly not unknown in Sicily.

celeriaccrop_0017
Sedano rapa, or celeriac, may look rather unattractive before peeling, but beneath the knobbly exterior is firm, fragrant white flesh. As you can see, the leaves are like celery.
When Is Celeriac in Season?

Celeriac is a cool-weather vegetable. In Australia it is generally at its best from late autumn through winter, with good supplies during July and August, but I have also found it to be available well into October. In Italy and elsewhere in the Northern Hemisphere, its season extends broadly from autumn into early spring.

Whenever possible, I buy celeriac with its leaves still attached. Fresh, green leaves are a useful indication of freshness, but there is another reason: I use them.

The stronger outer leaves can flavour soups and stocks, while the small, tender leaves from the centre can be added to salads.

We Italians, or at least this Italian, do not like throwing useful food away.

How to Prepare Celeriac

The first task is to deal with that intimidating exterior.

I always buy my celeriac with leaves, this is  an indication of how fresh the bulb is. Cut away the root end and peel the celeriac generously with a sharp knife, removing the rough skin, knobs and crevices. Once the rough exterior is removed, celeriac is dense, smooth and creamy-white, with a distinctive fresh celery taste and aroma.

Celeriac discolours quite quickly when exposed to air, much as an apple does. If I am serving it raw, I therefore prepare it last and dress it immediately with lemon juice or another acidic dressing.

Celeriac the Triestine Way

In Trieste, we used to eat sedano rapa bollito e in insalata – boiled celeriac dressed simply as a salad.

The celeriac was peeled, cut into large pieces and boiled in salted water until tender but not falling apart. Once drained and cooled slightly, it was dressed with extra virgin olive oil, lemon juice or vinegar, salt and pepper.

There is nothing elaborate about it, but this kind of simple preparation is typical of so much Italian home cooking: good produce, cooked appropriately and dressed without disguising its flavour.

It can be served warm or at room temperature and makes an excellent accompaniment to meat.

Celeriac in Northern Italian Cooking

Celeriac is much more familiar in the cooking of northern Italy than it is in many southern regions, and traditional preparations vary considerably.

In Verona, for example, celeriac is made into substantial soups with borlotti beans, onion and carrot, enriched with meat stock and fresh pork sausage. This is the sort of hearty, sustaining food that makes sense in the colder climate of northern Italy.

In Piedmont, celeriac also appears in lighter soups made with broth and served with good bread and grated cheese. The way they present it is very much like a French onion soup.

And then there is one of Piedmont’s most distinctive dishes—bagna cauda.

Raw Celeriac with Bagna Cauda

I particularly like celeriac raw, and its crisp texture makes it an excellent vegetable to serve with bagna cauda.

Bagna cauda, literally “hot bath”is the famous Piedmontese warm sauce traditionally made with anchovies, garlic and olive oil, with butter appearing in many versions. Raw and lightly cooked vegetables are dipped into it at the table.

Celeriac is ideal for this dish as its fresh, strong flavour complements the salty richness of anchovy, butter and garlic. It is also crisp and aromatic, making it perfect for dipping into warm Piedmontese bagna cauda. Cut it into batons, rub it with a little lemon juice to keep it white.

Celeriac and Apple Salad

My preferred method of consuming celeriac is raw in a salad. This is not a traditional Italian recipe but one I personally enjoy.

I julienne the peeled celeriac and combine it with apple, then dress everything immediately with extra virgin olive oil, lemon juice, salt and freshly ground black pepper. The lemon adds freshness and helps prevent both the apple and celeriac from turning brown.

From there, the salad can take several directions.

Red Radicchio

Radicchio adds colour and pleasant bitterness. Watercress is another favourite addition, and rocket works well too. A little egg mayonnaise can make the salad richer and turn it into something more substantial.

The contrast is what makes it so appealing: crisp celeriac, sweet-tart apple, bitter leaves and a sharp lemon dressing.

IMG_4227 (1)
A fresh celeriac and apple salad with radicchio – the lemon dressing adds zing while helping to keep the celeriac and apple pale.

Other Ways I Cook Celeriac

Celeriac also responds beautifully to cooking.

I make it into soup, sometimes on its own and sometimes combined with potato. I also mash celeriac with potato, adding butter and cream for richness, or extra virgin olive oil and lemon juice for a lighter, more Mediterranean version.

It can also be roasted. Cut into chunks or wedges and tossed with olive oil, it develops a sweeter, nuttier flavour and crisp golden edges while remaining soft inside.

And boiled celeriac, simply dressed with good olive oil and lemon or vinegar, remains one of the easiest and most satisfying ways to eat it.

A Sicilian Connection

Although sedano rapa is much more closely associated with northern Italian cooking, it also has a place in my family’s Sicilian memories.

My father spent his youth in Ragusa before moving to Trieste. He remembered his mother boiling celeriac and dressing it simply with olive oil. Apparently, my grandparents also grew it at their mulino, a water mill near Ragusa Ibla.

The countryside surrounding Ragusa once housed numerous water mills, constructed along waterways to facilitate the movement of water for wheat grinding. These places were part of the agricultural life of the region.

My grandparents’ mill was also a place where they kept their dogs and cultivated a few vegetables.

When I visited Sicily as a child, we went to the mulino often. During the hot summers, it was somewhere to walk to and escape for a while from their apartment in the city.

That old mulino became part of my memories of Ragusa.

Years later, while watching an episode of Inspector Montalbano, I saw Montalbano going to a restaurant in an old mill. For a moment I was convinced I recognised my grandparents’ mulino. My relatives in Ragusa soon disappointed me: it was not theirs.

So much for my moment of television fame by association.

The Mulini of Ragusa

On a later visit to Sicily, I visited another old water mill that had been restored and brought back into use. Once again, grain was being stone-ground there, this time producing high-quality flour from organically grown wheat.

There was something satisfying about seeing an old agricultural structure working again for the purpose for which it had originally been built.

And perhaps that is why a celeriac can lead me so far from the vegetable itself.

I may begin with a knobbly sedano rapa at the Queen Victoria Market and a stranger asking, “What do you do with it?” But food has a habit of carrying memories with it—from a simple salad in Trieste to my grandmother’s kitchen in Ragusa and an old water mill in the Sicilian countryside.

So, what do you do with celeriac?

Quite a lot, as it turns out.

RICOTTA RAVIOLI and STONE GROUND FLOUR

PIEDMONTESE favourites

TASMANIA, FOOD, ART, HOBART and Bagna Cauda

Kohlrabi, Fennel, Celeriac and Daikon make a good salad (and other recipes)