| 1 | Preheat oven to 400 degrees. |
| 2 | Sprinkle fish with one tablespoon lemon juice, salt and pepper. |
| 3 | Arrange in a 12-by-7 inch baking dish. |
| 4 | Bake 10 to 15 minutes (about 20 minutes if fish is frozen) or until fish flakes when tested with a fork. |
| 5 | meanwhile, in a medium skillet, cook celery, green pepper and green onions in margarine until tender. |
| 6 | Dissolve cornstarch in remaining three tablespoons lemon juice. |
| 7 | Add to skillet with remaining ingredients. |
| 8 | Bring to boil. |
| 9 | Reduce heat and simmer five minutes. |
| 10 | Serve sauce over fish. |
| 11 | Refrigerate leftovers. |
