Scalloped Potatoes
["5 medium potatoes", "6 Tbsp. butter", "1 1/2 c. milk", "2 Tbsp. cornstarch", "2 Tbsp. diced onion", "salt and pepper to taste"]
["Mix potatoes and onions; put in greased pan.", "Make sauce by mixing milk, butter, cornstarch, salt and pepper.", "Cook until smooth.", "Pour over potatoes.", "Bake 90 minutes at 360\u00b0, uncovered."]
["potatoes", "butter", "milk", "cornstarch", "onion", "salt"]