I take the skin off. Place aluminum foil shinny side up. Smear foil with margarine. Put fish filet on foil. Add more margarine and sprinkle with herbs (an Italian Dressing packet is good - sprinkle on dry). Close foil. bake maybe 15 - 20 minutes on the grate turning once.
You might want to try poaching (cooking, not stealing). Take a frying pan with water and spices in it. Heat to near boiling. Add fish filets. Turn after a couple minutes. When both sides are white and firm they're done. Serve with melted margarine on the side.