Meatloaf and potatoes team up in this all-in-one casserole. A basic ground beef meatloaf combination tops the sliced potatoes and onions. It's a simple yet tasty one-dish meal. Because the meat mixture tops the potatoes, it should be no fattier than 85%. It's a versatile casserole you'll make again and again. To add richness and flavor, feel free to sprinkle 1/2 to 1 cup of shredded cheddar cheese over the potatoes. A lower to medium starch potatosuch as red-skinned or yukon goldwill hold its shape better than the high-starch russet or baking potatoes, but any variety will do.