Place all ingredients, except cheese and bacon, in a large bowl. Beat with an electric mixer on medium-high speed until potatoes are fairly smooth and creamy. Spoon mixture into a lightly greased 13×9-inch baking dish. Sprinkle with cheese and bacon. If you prefer extra crispy bacon, reserve bacon and sprinkle at the end of cooking. Cover and bake in a 350°F oven 30 minutes or until heated through.