from heat and stir in 3 cups of cheese. stir until cheese is completely melted.
3. pour cooked macaroni into pot and stir to coat. pour into a greased 13×9 casserole dish. top with remaining cheese. in a small bowl, combine bread crumbs with 2 t. melted butter or margarine. sprinkle on top of the casserole. bake at 350 degrees for 25-30 minutes, until bubbly and golden brown. 