Au Gratin Potatoes
["1 (1 lb.) can sliced potatoes (liquid reserved)", "1 c. milk", "4 Tbsp. butter", "3/4 tsp. salt", "1/4 tsp. pepper", "2 1/4 c. instant mashed potato flakes", "1/2 pt. dairy sour cream", "8 oz. grated sharp cheese", "4 Tbsp. dry minced onion or 1/2 chopped fresh onion", "1/2 c. butter", "1 c. grated American cheese"]
["Drain potatoes.", "Reserve liquid and add enough water to make 2 cups.", "Pour into 2-quart saucepan.", "Add milk, 4 tablespoons butter, salt and pepper.", "Bring to a boil.", "Remove from heat at once and immediately stir in mashed potato flakes.", "Stir in sour cream, sharp cheese and onion."]
["potatoes", "milk", "butter", "salt", "pepper", "instant mashed potato", "sour cream", "cheese", "onion", "butter", "American cheese"]