If you are using frozen fish, first defrost it in cold water. Once the fish is defrosted, start preparing it.

Pat the fish dry and place it in a small ovenproof dish or on a baking tray lined with parchment paper. Place it in an oven preheated to 200°C and bake until properly cooked, about 15-20 minutes (depending on the thickness of the piece).

Transfer the fish to a plate and optionally season to taste with salt and pepper.