12 large raw prawns, heads and shells removed but reserved, tails on
3 tbsp red wine vinegar
1 tbsp caster sugar
2 tbsp olive oil
5 garlic cloves, roughly chopped
½ onion, roughly chopped
1 stick celery, roughly chopped
1 green pepper, deseeded and roughly chopped
100ml/3½fl oz dry white wine
1 tsp salt
10 turns black peppermill
½–1 tsp dried red chilli flakes
400g tin chopped tomatoes
20 mussels, scrubbed and debearded
250g/9oz cod fillet, cut into 4cm/1½in pieces
1 tsp dried oregano
6 slices sourdough bread
1 garlic clove, peeled and cut in half
small handful flatleaf parsley, roughly chopped
Bring the stock to a simmer, add the prawn heads and shells and simmer for 20 minutes. Strain the stock into a clean bowl and set aside.
Bring the vinegar and sugar to the boil in a small saucepan and simmer until reduced by half. Set aside.
Heat the oil and butter in a large lidded saucepan. Stir in the garlic, onion, celery and green pepper and cook for 6–8 minutes or until soft. Add the white wine, salt, pepper, chilli flakes, tomatoes, fish stock and vinegar reduction. Simmer for 30 minutes, adding the oregano for the last 5 minutes.
Discard any mussels with broken shells and any that refuse to close when tapped. Add the prawns, cod and mussels, cover the pan with a lid and cook for 5 minutes.
Meanwhile, toast the sourdough on both sides and carefully singe slightly over a gas flame. Rub the toast with the cut-side of the garlic and drizzle with olive oil.
Before serving, discard any mussels that remain closed. Place a slice of the toast in each bowl, ladle in some stew and sprinkle with parsley.