Cover with aluminium foil and cook for 20 minutes or until the tomato has softened slightly. Add the mussels, cover with foil and cook for a further 15–20 minutes or until the mussels have opened. Top ...
Add the wine, water or fish stock, tomatoes, tomato paste ... prawns and mussels, then spoon over a little more of the sauce. Serve immediately. Mashed potato can be made in advance.