Cotriade

• 7 oz (200 g) butter
• 3 large onions, 1

Melt the butter in a large saucepan and add the chopped onions. When they are beginning to colour, add the whole onion, potatoes, bouquet garni and chunks of eel. Cover with water, add salt and plenty of pepper. Bring to the boil and cook for 15 minutes.

Add the bass, wrasse and mackerel and cook for a further 5 minutes. Finally add the whiting and sardines and cook for another 5 minute