Cook beans in boiling water 15 to 20 minutes or until tender; drain well. Sauté onion and green pepper in margarine in a small skillet until tender.
Add soup and onion mixture to beans. Pour into a lightly greased 1-quart baking dish. Bake, uncovered, at 350° F or 25 minutes. Combine cheese and cracker crumbs and spread over casserole; bake another 10 minutes.Servings: 6