Potatoes And Ham Casserole
["1/4 c. melted butter", "1/4 c. all-purpose flour", "1/2 tsp. dry mustard", "2 1/2 c. milk", "1 tsp. salt and pepper", "1 (8 oz.) pkg. sharp Cheddar cheese, divided", "2 c. chopped, cooked ham", "2 Tbsp. chopped onions", "6 sliced, cooked potatoes"]
["Combine butter, flour and mustard; cook over low heat, stirring constantly until bubbly.", "Gradually add milk; stir constantly until smooth and thick.", "Season sauce with salt and pepper.", "Add 1 1/2 cups of cheese.", "Stir until melted.", "Stir in ham and onions.", "Place cooked potatoes in a lightly greased 2-quart dish; pour sauce over potatoes.", "Top with remaining cheese.", "Bake at 350\u00b0 for 45 minutes."]
["butter", "all-purpose", "dry mustard", "milk", "salt", "Cheddar cheese", "onions", "potatoes"]