2 tbsp. butter
2 tbsp. flour
1 tsp. sugar
2 tsp. chopped onions
salt
pepper
1/2 c. sour cream
2 cans drained green beans
2 c. grated Swiss cheese
1/2 c. corn flake crumbs
2 tbsp. melted butter

Mix first 6 ingredients together in large saucepan. Add sour cream. Stir constantly until bubbly. Add green beans. Spread in shallow casserole dish. Top with grated Swiss cheese and corn flake crumbs (1/2 cup corn flakes and 2 tablespoons melted butter).

Bake 20 minutes at 400°F.