Combine the melted cooking fat, mayonnaise, minced onion, dried dill and dried thyme in a bowl and mix well. Season to taste with sea salt and freshly ground black pepper.
2 tablespoon cooking fat, ½ cup homemade mayonnaise, 1 small onion, 2 teaspoon dried dill, ¼ teaspoon dried thyme, Sea salt and freshly ground black pepper to taste
Grease a baking dish with some cooking fat, place the fish in it and pour the creamy sauce over it.
2 medium cod fillets, Cooking fat
Bake in the preheated oven until the fish is just cooked through, about 10 minutes per inch of thickness.