How to make caldo verde, a hearty Portuguese soup, using Chinese kale or curly kale
Kale, a leafy superfood, is nutritious and delicious in a Portuguese soup or a simple salad. Use Chinese kale for the soup if you can't find curly kale.

Kale is one of the latest ingredients to be dubbed a “superfood” and, as such, is very fashionable. Unlike superfoods such as the wolfberry (kei chi) – which is fine as an ingredient but doesn’t have enough flavour to eat on its own – kale is not just good for you, it can be delicious, too, if prepared correctly.
I’ve eaten many versions of caldo verde and they have varied considerably. Some had a lot of meat, such as ham and sausage, others used only a tiny amount, as a seasoning. Sometimes the caldo verde was thick with puréed potatoes and vegetables, other times it was light, although still deeply flavoured.
The first time I tested this recipe, I used imported curly kale, but when I tried to make it for another occasion I couldn’t find the vegetable in any supermarkets, so I made it with Chinese kale (kai lan). It was delicious – and I don’t think a thrifty Portuguese grandmother would protest too much at the substitution.
After all, caldo verde isn’t an haute-cuisine soup; it’s just simple, hearty and delicious.
About 30ml cooking oil
1 medium-sized onion
2 garlic cloves
300 grams curly kale or Chinese kale
325 grams potatoes
100 grams Portuguese chouriço or Spanish chorizo
About 400ml unsalted chicken stock, preferably home-made
Fine sea salt and freshly ground black pepper
Extra-virgin olive oil or rendered chouriço/chorizo
fat (from pan-frying the sausage), for drizzling