This is a rather nice quick Spanish dish but don't ask be where I got it from. A cod fillet is roasted with a combination of chorizo, tomatoes, mushrooms and garlic, and seasoned with rosemary thyme, parsley, spring onion and spices.
Some fish fillets will need more cooking - it'll depend on how thick the fish is.
Try this recipe with inexpensive fresh coley or pouting. They both belong to the cod family but are much cheaper and available in larger supermarkets or fishmongers.