Wash and scale the fish. Wipe dry, and rub marinade all over body evenly(even inside body). Heat some oil in a pan, and pan fry on both sides of fish until golden in colour. Take out and reserve for later use.
Heat some oil, stir fry bell pepper and tomatoes. Add in ingredients for sauce, and cook for a while until it thickens. If sauce is too thick, add a little bit of water.
Put fish back in the sauce and briefly cook and serve, ouring sauce over the fish.