Soak the haricot beans overnight in plenty of cold water; drain them when ready to cook.
2
Step 2
Heat the oil in a large pan and sauté the prawns, onions, garlic, ginger and chilli until the onions are translucent.
3
Step 3
Add the paprika and cook for a minute or two, then add the tomato purée and cook again, stirrng so that you are almost frying the purée.
4
Step 4
Now add the drained beans and pour in half the hot chicken stock.
5
Step 5
Bring to the boil, and then cover the pan and simmer for one and a half hours or until the beans are tender.
6
Step 6
Add the lentils and the remaining litre of stock and cook for a further 30 minutes.
7
Step 7
Season with salt and pepper.
8
Step 8
To finish off, heat the chopped chorizo in a hot pan and scatter over the soup with the coriander just before serving. Serve with crusty bread and a small green salad.