1Cook green beans according to package directions; omitting salt; drain. Cook bacon in a large skillet until crisp. Remove bacon with a slotted spoon, reserving drippings. Saute onion in drippings until tender; remove onion, and set aside.
2Add flour and sugar to bacon ; cook over low heat one minute, stirring well. add milk, cook stirring constantly until thickened. stir in mayonnaise, green beans, bacon, and onion. Spoon into a lightly greased 1 1/2quart casserole. sprinkle top evenly with shredded cheese and buttered cracker crumbs. bake at 350 fereinheit for 20 minutes. serve