Green Bean Ham Potato Casserole

Ingredients 3/8 c. butter 3/8 cup. flour 3 c. milk 1 1/2 c. grated cheddar or American cheese 4 c. green beans cooked 4 medium potatoes, cooked and diced 3 c. cooked, diced ham Directions: Melt butter and stir in flour.  Add Milk, stirring constantly until thickened. ...