1 lb. fish fillet (haddock, scrod, grouper, flounder)
1 med. onion, diced into lg. pieces
1 sm. can sliced mushrooms
1 can tomato soup, not diluted

Saute onion. When tender, add mushrooms and cook until tender. Add soup and warm this mixture. Put the fish into a baking dish. Pour the soup mixture on top. Bake covered for 45 minutes at 350 degrees and uncovered for 15 minutes at 350 degrees.