Boil macaroni as usual, drain ... ingredients, spread mozzarella cheese over top and bake at 350°F. until macaroni is heated through, about 45 minutes.
Place hash brown potatoes in greased 13 x 9 baking dish. Add cooked hamburger over the top. Sprinkle with ... cheese on top. Bake at 350°F for 1 hour or until brown.