A traditional Senegalese recipe, fish cooked in a lemon-onion-mustard marinade.
If using whole fish:
Cut several slits in the side of the fish to allow it to better marinate.
In a glass bowl or baking pan mix all ingredients (except the fish) to make a marinade. Place the fish in the marinade, covering both sides, and allow it to marinate an hour. Remove fish from the marinade, but save the marinade. Cook according to one of the following methods.
Cooking method 1: Cook fish over an outdoor grill (or broil fish in a hot oven) until done. If grilling: a hinged wire basket made for holding fish on the grill is very useful.
Cooking method 2: In a frypan, fry the fish on each side in hot oil until done.
While fish is cooking: Pour the marinade into a saucepan and bring to a slow boil. Reduce heat and simmer until the marinade thickens into a sauce.
Servings 4