1Heat oven to 400°F. Lightly grease bottom only of 8-inch square (2-quart) glass baking dish with shortening or cooking spray. In 10-inch skillet, cook beef and onion over medium heat, stirring occasionally, until beef is browned; drain. Stir in sloppy joe sauce and cheese. Spoon into baking dish.
2In medium bowl, stir together remaining ingredients until blended. Pour over beef mixture.
3Bake about 30 minutes or until golden brown.