Make white sauce - Melt 4 tablespoons butter. Stir in 4 tablespoons flour. Add:

Salt
Pepper
Dash of Worcestershire sauce
Prepared mustard
Lawrys seasoned salt
1 onion, chopped fine

Stir in 1/2 pint sour cream. Add 1 package Swiss cheese (chopped) and stir until melted. Remove sauce form heat and mix with 2 cans French style green beans (well drained). Put in casserole and top with corn flake crumbs, tossed with melted butter (may use potato chips). Bake at 350 degrees for 15 to 20 minutes. May be kept in refrigerator 2 to 3 days. Take out of refrigerator 1/2 hour before baking.