Scalloped Potato Bake 3 tablespoons butter 3 tablespoons all-purpose flour 2 cups milk 4 to 5 large potatoes 1 large onion, chopped 1 cup cooked cubed ham 1 teaspoon salt 1/4 teaspoon pepper 4 cups shredded American cheese Preheat oven to 350. In saucepan, melt butter over low heat. Add flour, stirring until smooth. Cook for 1 minute, stirring constantly. Gradually stir in milk. Cook over medium heat, stirring constantly until thickened and bubbly. Peel and cut potatoes into 1/4 inch slices. Layer half of potato slices, onion, ham, salt, pepper, cheese and white sauce in order given in 1 1/2 quart casserole dish. Repeat layers. Cover. Bake for one hour. Makes 8 servings.