Turn the oven to 175 degrees
Rinse the fish fillet and dry it. Put it in a greased, ovenproof dish and brush with a little oil
Put the fish in the oven and bake it for approx. 10-12 minutes
Cool the fish. If there is skin on, it must be pulled off
Finely chop the fish with a fork or blender
Stir mayonnaise, creme fraice and lemon juice together in a bowl. Stir in the fish and season with a little salt and pepper.