5 Cans cut green beans, drain 4 cans
Combine margarine, flour, salt, pepper, sugar and liquid from one can of green beans and heat in medium saucepan. Stir in sour cream and onion flakes. Stir green beans into sauce. In a 9x13 inch baking dish sprayed with a non-fat cooking spray, layer green bean mixture with cheese, top with crushed cornflakes. Bake at 350 degrees for 20-30 minutes.