2 tbsp. flour
2 tbsp. butter
1 1/2 c. sour cream
1/2 tsp. grated onion
1 tsp. salt
1/4 tsp. sugar
2-3 cans whole green beans
1/2 to 3/4 lb. grated Swiss cheese
1/2 c. bread crumbs
2 tbsp. melted butter

Melt butter over low heat in a heavy saucepan. Blend in flour, grated onion, salt, and sugar. Cook over low heat, stirring until mixture is smooth and bubbly. Stir in sour cream, heat, do not boil. In 9 x 13 dish or other casserole dish alternate layers of green beans and Swiss cheese. Top with Swiss cheese, sour cream sauce. Mix together melted butter and bread crumbs. Sprinkle over top of casserole. Bake at 400 degrees for 20 minutes.