Cheesy Meat Loaf With Mashed Potatoes
["1 to 1 1/2 lb. ground beef (lean)", "2 slices wheat bread, cubed", "1 egg", "1/3 c. ketchup", "salt", "pepper", "1/2 medium onion, chopped (optional)", "5 red potatoes, peeled, boiled and mashed with milk and butter", "5 slices Velveeta cheese"]
["Heat oven to 350\u00b0.", "Mix ground beef, bread, egg, ketchup, salt, pepper and onion.", "Put into round or 8-inch square baking dish.", "Bake 40 minutes."]
["ground beef", "bread", "egg", "ketchup", "salt", "pepper", "onion", "red potatoes", "Velveeta cheese"]