Celeriac purée

These days, few of the vegetables you'll find in the supermarket are truly seasonal. We've got year-round mange tout peas (I remember the days when my parents grew them in the garden - the season only lasted for about about a month, but my, were we sick of peas at the end of that month); year-round broccoli and year-round cauliflower. Spring cabbage appears in the shops in summer, autumn and winter, and out-of-season asparagus is there whenever you want it. It doesn't taste of anything, but if you want it, it's there.

Happily for those outraged by man's twisting of nature, here are a few season-specific things that you won't find all year round. Some English root vegetables in particular are only easy to find in the winter (for the most part - there's always bound to be someone bussing turnips in from Australia in high summer), and they're wonderful in the cold months. It makes sense really - these roots are the energy store of the plants, and so they're full of sugars and other nutrients.

Celeriac is one of my favourite winter roots. It's the taproot of a celery plant (not the same one you use to dip in your hummus or to stir your Bloody Mary), but tastes much richer, deeper, creamier and sweeter than celery. I know people who can't bear celery, but who will happily munch on celeriac; they're really very different flavours. This vegetable isn't readily found outside Europe, but if you are an American reader and happen upon one in a market, snap it up so you can impress your friends with your cosmopolitan cooking.

Although modern 'best before' stickers tend to suggest you can only keep your celeriac for a week or so, the root will actually keep in the fridge for a month or so if wrapped in plastic to keep it nice and humid- inside your fridge it is dark and cold, which fools the root into thinking it's still underground - the celeriac won't be any the worse for it.

The celeriac is a knobbly, rough-skinned vegetable, and its flesh is very hard. Make sure you have a very sharp knife to remove all the skin and nubbly bits, and to cut through the solid root. It makes a lovely soup (which I really ought to blog some time), and it's great raw in coleslaw. One of the very nicest of French crudités is simply grated raw celeriac blended with a little home-made mayonnaise. But for my money, one of the best things you can do with a chunk of celeriac is to cook it until soft, mash it with a little potato, push the resulting mixture through a sieve and whip it with butter and cream for a very fine and rich side dish.

To make celeriac purée as an accompaniment for four, you'll need:

1 large celeriac, about 20 cm in diameter (anything larger than this may be a bit woody)
2 medium potatoes (choose a variety which is good for mashing)
100 ml double cream
2 heaping tablespoons salted butter
2 level teaspoons salt (plus more to taste)

Using a very sharp knife, peel the celeriac and cut it into 2 cm square chunks. As soon as you have cut a piece, put it in a saucepan of cold water to stop it from oxidising and turning brown. Peel the potatoes and cut them into chunks about twice the size of the celeriac pieces, and add them to the pan. Warm a mixing/serving bowl.

Bring the potatoes and celeriac to the boil, put the lid on the pan and simmer for 15 minutes. Poke the vegetables with a fork to check they are soft (if they are not, cook for another 5 minutes). Drain and use a potato masher to mash the celeriac and potatoes until they are as even as you can manage.

Melt the butter and cream together in a milk pan, and bring to a very low simmer as you sieve the purée.

Push the mashed mixture through a sieve using the back of a ladle. You can also use a mouli or food mill if you have one. The resulting purée will be extremely smooth. Put the purée into the warmed bowl and use a hand whisk to whip the butter and cream mixture into the purée with the salt, and serve immediately. This is particularly good with rich meat dishes and roasts.

Golden winter vegetable soup with frizzled chorizo

Soothing, sweet, buttery, winter vegetables are a real blessing when the weather's cold. Plants keep a store of energy in the form of sugars in their tubers and roots, and those tubers and roots make for some surprisingly uplifting eating. This soup is passed through a sieve after being liquidised to ensure a silky, creamy texture. If you don't own a food processor you can still make it - at the stage where the ingredients go into the processor bowl you can just mash them with a potato masher for about ten minutes, then pass the resulting mush through a sieve, pressing it through with the bottom of a ladle. You will end up muscular and with a very good pan of soup.

Because of all the plant sugars in these vegetables, you'll find you need something salty to counter the sweet taste. I've cut chorizo into coins and fried it until it's crisp and friable - a lovely contrast in texture with the silky, creamy soup. The result is a lovely sun-coloured dish at a time of year when the sun is a distant memory.

To serve four as a main course, you'll need:

1 small celeriac
3 small sweet potatoes
1 small swede
1 small butternut squash
1 small onion
2 shallots
1 parsnip
3 carrots
1 leek
3 tablespoons butter
1 litre chicken stock (vegetarians can substitute vegetable stock and use croutons instead of the chorizo)
200 ml double cream
2 teaspoons salt
½ a nutmeg, grated
10 turns of the pepper mill
2 tablespoons chopped chives

Peel all the vegetables and cut them all into 1-inch chunks. Melt the butter in a large pan with a heavy base (this will help the soup cook evenly - I recommend Le Creuset pans, which are made of enamelled cast iron, and disperse heat beautifully) and sweat the vegetables, stirring regularly, until they begin to soften. You'll find that the sweet potato pieces may brown a little. Don't worry about it; they contain so much sugar that it's hard to prevent a little of it caramelising, and it just gives depth to the soup.

When the vegetables are softening evenly, pour over the hot stock. It's best if your stock is home-made, but some of the liquid stocks you can buy at the supermarket these days are a good substitute if you don't have any in the freezer. Bring the stock and vegetables to a simmer, cover with a lid and leave for 20 minutes or until all the vegetables are soft all the way through.

While the soup simmers, slice a chorizo into pieces about the same size as a pound coin and fry over a medium flame in a dry frying pan, stirring and flipping the pieces occasionally. The chorizo will release its fat and the pieces will become crisp. After about 20 minutes, when the chorizo is crisp and dry, remove the pieces and drain on paper towels. Reserve the oil.

Transfer the vegetables and stock to a large bowl and liquidise in batches, passing each processed batch through a sieve back into the large pan. You will find you need to push the soup through the sieve with the back of a large spoon or ladle. Return the pan to a very low heat and stir in the cream, salt and pepper and the grated nutmeg. Bring to a simmer and serve with a drizzle of chorizo oil, some chorizo scattered over (keep some more in a bowl for people to help themselves) and a sprinkling of chopped chives.

Coleslaw

"I don't like coleslaw."

Mr Weasel really should know better by now. It's been nearly ten years; surely that's enough time to realise that saying such a thing could only have one possible result?

I made some coleslaw.

You'll need:

¼ celeleriac, peeled
5 carrots, peeled
¼ white cabbage
2 tablespoons double cream
2 tablespoons mayonnaise (make it yourself or use Hellman's - I've still not found another I'll allow fridge space)
Juice of 1 lemon
1 teaspoon toasted caraway seeds
2 teaspoons walnut oil
½ teaspoon sugar
Salt and pepper

Julienne (cut into fine strips) all the vegetables. This will be infinitely easier if you own a mandoline or a food processor with the relevant blade. The rest of the recipe is simplicity itself - just mix the lot together in a big bowl. Taste to see if you need more lemon, salt or sugar. Then serve immediately.

The idea with coleslaw is that it should be creamy and fresh. It's really not good if you leave it hanging around (like supermarket or fast food coleslaw); it needs its crunch. This means that it doesn't make for good leftovers. This will make enough for two people. Swap the mayonnaise for Greek yoghurt if you want a slightly lighter texture.

Mr Weasel's verdict? He finished his bowl in under a minute, wiped his mouth and said:

"Is there any more?"