oca

Tuberous Chervil

16 January 2025

Earlier we wrote about mashua and oca, two forgotten vegetables. This week we enjoyed tuberous chervil, another forgotten vegetable, also known as turnip chervil and bulbous chervil. Popular throughout continental Europe in the 19^th century, but now hard to find. The tubers we bought had a length of approximately 4 cm and a thickness of 2 cm. They are white on the inside. The tuberous chervil is very tasty, easy to prepare, and its flavour will make you think of chestnuts, without a hint of bitterness.
As more often, these winter vegetables were replaced by potatoes: cheaper, easier to handle and easier to grow.
The ‘chervil’ in the name does not mean it’s the tuber of the chervil plant (like parsley and parsley root are related). It’s included because the leaves of tuberous chervil (see picture below) look like the leaves of chervil. The two are not at all related.
According to some sources tuberous chervil can be eaten raw. We tried it, of course, and yes, edible, but not great. We prefer to turn the tubers into a purée, with cream, butter and nutmeg. We combined the purée with lamb chops and with scallops. The second combination didn’t work, as if bringing the two together diminished the individual flavours. The first combination was delicious, the sweetness of the meat with the chestnut flavour, the freshness of the puree with the fatty lamb.

Wine Pairing

We enjoyed a glass of red wine from the Bordeaux region with our purée and lamb, produced by Château Picon. A very nice, affordable wine, with some dark fruit and acidity. In general, we suggest a not too complex red wine, made with for instance cabernet sauvignon and/or merlot grapes.

What You Need

250 grams of Tuberous Chervil
Butter
Cream
Nutmeg
Black Pepper

What You Do

If the tuberous chervil are young and fresh, you don’t need to peel them. The ones we bought were a bit older, so we peeled them. Wash and cook for 5-10 minutes until soft. Drain. Mash using a fork, add butter and cream. Use a spoon to make the purée. The tubers love both, so you will probably need to add a bit more than expected. Keep warm on low heat, add black pepper and freshly grated nutmeg to taste. Quickly fry the lamb chops, add lots of herbes de Provence or a combination of thyme and oregano and serve with the purée.

Chicken with Morels

1 March 2024

A few weeks ago we bought the first fresh morels of the season. They looked beautiful but unfortunately, they were very bland. Not the typical pancake, buttery taste, not the intriguing aroma. Pity, but worth a try.
This week we bought some great looking dried morels at our favourite epicerie. Dried morels are as tasty as fresh morels, which makes them very different from all other mushrooms. Dried cèpes are such a disappointment. We bought 15 grams and talked about preparing veal with morels and madeira. Monsieur Max, who runs the epicerie, mentioned he preferred to combine them with chicken. Great idea, we said, let’s do that.

The dish relies on the quality of the chicken, the morels and the white wine. Ideally this is Vin Jaune, a wine produced in the Jura in the far east of France and made from Savagnin grapes. This wine is often compared to Fino Sherry, but we think it has more character and length. It also not fortified, so no alcohol was added.
We served the chicken and morels with fried oca. A combination that worked very well, because the oca brought freshness to the dish. Perhaps its oxalic acid?

Wine Pairing

We opened a bottle of Arbois Savagnin 2018. This complex, white wine is made from the same Savagnin grape and is also produced in the Jura. It comes with aromas that will make you think of nuts, curry and even umami. When tasting it, you may think the wine is off, given it is slightly oxidized. In this case it’s a good thing. Enjoy the savoury, nutty taste of the wine in combination with the various flavours in the dish.

What You Need

3 organic Chicken Thighs
Butter
1 Shallot
15 grams dried Morels
50 ml Arbois Wine
50 ml Double Cream
1 Egg Yolk

What You Do

Check if the morels are clean. If not, use a brush to clean them or rinse with water. Soak the morels in fairly warm water for at least 30 minutes, depending on the quality. In the meantime, finely slice the shallot lengthways. Pat the chicken thighs dry and halve. Fry the thighs in butter until golden brown, perhaps 4 minutes. Set aside and cover with aluminium foil. Fry the shallot in the remaining butter on low heat for a few minutes. Drain the morels, pat dry with kitchen paper and halve lengthways. Keep the soaking water. Add the morels and combine. Leave on low heat for a few minutes. Add the wine and leave to reduce by half. Add some morel juice and reduce. Add cream and allow to warm through and through. Allow to simmer for a few minutes, add the chicken. Leave on low heat until the chicken is done, perhaps 15 minutes. Now it’s time to taste the sauce and see if you have enough. Happy? Beat one egg yolk. Slowly add the mixture from the pan to the egg yolk (this is called ‘marrying the sauce’). Then transfer the mixture to the pan. Warm carefully, otherwise it will split. To serve, place the chicken pieces on a warm plate with some morels on top. Cover with the rich, aromatic sauce.

22 February 2024

There are so many interesting vegetables and fruits. We’re always keen to try something new, so last year when we found mashua we simply had to try it. And how about sand carrots?
This week we spotted oca at our bio-supermarket. Small red tubers from Peru. Hopefully not imported, but we bought them anyway.
Oca (Oxalis tuberosa, known as yams in New Zealand) originates from the Andes. It is grown in the highlands of several countries (Ecuador, Peru, Chile, Argentina). Oca’s are also cultivated in various other countries, including the UK, Mexico, New Zealand and France.
Oca is a member of the family of wood sorrels and the plant has clover-like leaves. The leaves and the stems are also edible. Nutrient wise oca tubers and potatoes are very similar. The oca tubers contain a high amount of vitamin C, calcium and iron. Oca tubers can be acidic, thanks to the presence of oxalic acid. The tubers have a lovely soft, red colour.

Oca tubers can be eaten raw, boiled and baked. We tasted a few slices of raw oca, only to find the texture not great and the taste a bit tangy, radish like. We decided to bake them in olive oil. The result was a pleasant surprise and some of the colour is still visible. The tubers tasted like a really, really good potatoes: soft and nutty.

What You Need

250 grams of Oca
Olive Oil
Black Pepper

What You Do

Preheat your oven to 180 °C or 355 °F. Wash the oca’s. Don’t be tempted to peel them because the peel is very tasty. Remove small bits of dirt with a sharp knife. Wash again and dry. Add olive oil to a baking dish, add the tubers and make sure they are nicely coated. Transfer to the oven and fry for 15-25 minutes, depending on the size. Allow to cool for a few minutes before adding black pepper.