Grouper in Coconut and Lime

• 3 lb (1.4 kg) grouper or any other firm white fish fillets
• Juice of 1 lime

Place the fish in a non–metallic dish, pour over the lime juice, add the onions, garlic and a large pinch of pepper, cover and leave to stand for about 30 minutes (a little longer won’t hurt).Then heat the oil in a frying-pan, remove the onions and garlic from the marinade and sauté them in the oil. Add the coconut milk. Put the fish into the pan and cook over a medium heat, basting regularly w