Put fish in porcelain or non-stick skillet.
Combine the rest of ingredients except cooking oil, and pour over the fish. Over medium heat, bring to a boil. Cover, lower heat and simmer for about 10 minutes turning fish once.
Transfer fish to a dish. Let sauce in skillet simmer until reduce Transfer to a small bowl and set aside.
Heat oil in skillet. Fry fish until brown on all sides. Place on serving dish. Pour sauce over it.