Photograph: Martin Poole
Heat the oil in a large frying pan, brown the chorizo, then transfer it to a plate.
Soften the onion and pepper in the oil for 5 minutes, then stir in the garlic and cook for a few minutes. Stir in the rice, saffron, paprika, chorizo and a little salt.
Pour in the stock, stir and leave the rice to cook gently, without a lid, for 20 minutes.
Push the prawns into the rice; scatter over the fish and mussels. Cover and simmer for 5 minutes. Remove from the heat. Leave to rest for 10 minutes, or until the seafood and fish are cooked; discard any mussels that don't open. Serve with the parsley and lemon wedges.