Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   3      tablespoons   cornstarch
     1/4  cup           water -- cold
   8      ounces        tomato sauce
   8      ounces        pineapple chunks -- undrained
     1/2  cup           sugar -- brown, firmly
                        -- packed
     1/3  cup           vinegar -- red wine
     1/4  cup           onion -- chopped
   1      small         green pepper -- cut in 1/2"
  16      ounces        fish fillets -- thawed

Preparation:

Combine cornstarch and cold water in a 2-quart glass measure or deep casserole dish, stirring well to dissolve cornstarch. Add the tomato sauce, pineapple chunks, brown sugar, vinegar, onion, and green pepper; stir well to dissolve the sugar. Microwave at HIGH for 4 minutes, stirring once; then stir well at end of cooking period. Microwave at HIGH for 4 to 6 minutes or until thickened and bubbly, stirring at 1-minute intervals. Arrange fillets in a 12x8x2" baking dish with thicker portions to outside of dish (thinner portions may overlap, if necessary). Pour sauce evenly over fillets. Cover with waxed paper; microwave at MEDIUM HIGH for 7 to 9 minutes or until fish flakes easily when tested with a fork, giving dish one half-turn during cooking.