I’m still dealing with the great Snowdonia kale mountain, which looks dangerously as though it’s about to run to seed. So much for my ‘hungry gap’ filler. Better pick it and eat it, then. And I know just what to do with it.

One of my all-time favourite ways to use the cavolo nero which grows so well in my garden is in the Italian soup ribollita: ribollita because it’s ‘reboiled’ – cooked one day, reheated and eaten the next. And the day after that.

What am I saying? It’s not Italian, it’s Tuscan. I’ve been doing a bit of research and have come to the conclusion that there are as many versions as there are Tuscan grandmothers.

There are four constants: kale or dark cabbage, some sort of dried or canned bean, olive oil and bread. One person’s nonna used potatoes; another thought that putting them in was a crime. Someone else refused to believe that you could have a ribollita without the addition of sausage. The identity of the beans caused a debate too: borlottis, or cannellini beans? What about tomatoes? Obligatory, or an offence?

So I turned to my collection of recipe books, and found an equal variety. One has a version which includes both potatoes and sausages, and suggests using any white beans, including butter beans. River Cafe have a fabulous recipe which goes for cannellini beans, no potatoes or sausage – only it serves 10. Anna del Conte’s recipe from Classic Food of Northern Italy has chillies in it (cannellini beans; no to sausage, yes to potato, yes to tomatoes). I’ve found another which adds chard and bread to a basic minestrone, and the minestrone has bacon in it as well as pasta and wine (surely not). I’ve found a recipe from another well-known food writer which oddly has no greens. That’s definitely not ribollita, but it may be an editing error.

I give up. But not on ribollita, because if I do give up on that the kale plants will uproot themselves and come marching into the house like triffids. So I’m doing my ordinary ribollita: no sausages, no potatoes, no pasta, no chillies, no wine (well, maybe a splash), no bacon; borlotti beans because I’ve got some in, and tomatoes just because.

Ribollita
serves 4

1 small head of celery
1 tbsp olive oil
3 carrots, peeled and chopped into roughly 1-cm pieces
2 small red onions, peeled and chopped
2 large cloves of garlic, crushed
a good bunch of flat-leaved parsley
250ml passata, or 1 x 400g tin tomatoes, drained and chopped (set the juice aside)
a huge armful of cavolo nero – about 750g untrimmed, 500g trimmed
1 x 400g tin of borlotti beans

To serve: good bread – it can be a day old – and more olive oil

Trim the celery well and remove the strings with a knife, then chop the sticks finely. If the leaves look good, finely chop a few of those too and put them to one side. Heat the olive oil in a large casserole or pan (with a lid) over a low to medium heat, and add the chopped celery, carrots and onions. Put the lid on and allow the vegetables to cook until soft, but don’t let them colour up. Add the garlic when the vegetables are almost ready; it – especially – must not burn, and then add the parsley and celery leaves (if using), stir them in, and cook everything together for a couple more minutes. Add the passata and continue cooking for another half hour or so – check to make sure the soup isn’t catching during this time; add a little water if necessary.

While the ribollita base is cooking, trim the cavolo nero. Discard any thick stems and, above all, any caterpillars (eek – surely it’s too early!), and then chop it into fine strips – it looks like a vast amount but it cooks down. Drain the borlotti beans and rinse them; put half the tin in a small bowl. Add the cavolo nero and the rest of the borlottis to the ribollita, and then top up with water, but be careful – this is a very thick soup (this is where you can add a splash of wine). Bring the heat up and simmer the ribolitta for 20 minutes or so.

Mash the remaining borlotti beans up with a fork and add them to the pan; cook for a further 10 minutes. If you want to be authentic – and it’s worth it for the depth of flavour – take the soup off the heat and leave it overnight, in the fridge if your house is warm (if you can’t wait, cook it down until the soup is very thick). Check for seasoning before reheating, then cook it until there is very little liquid left. Break up some stale-ish bread and stir it into the ribollita just before serving. Ladle the soup into bowls – it should be too thick to pour easily – then add a good drizzle of olive oil and serve.

And it’s yummy. Especially on a day like today when the mist is down, the drizzle is persistent and yesterday’s promise of spring was a cruel joke from the weather gods.