This hearty hamburger pizza casserole is perfect for satisfying a pizza craving without having to order takeout. It makes a fabulous everyday family meal, as well as a great option to take to a potluck dinner. Add a simple tossed green salad and garlic bread for a satisfying dinner. This makes excellent leftovers, too. Just cover the baking dish with foil and reheat the casserole in a 400 f oven for about 25 minutes, stirring about halfway through the cooking time.