Sloppy Joe Pot Pie

1 pound ground beef
1/2 cup chopped onion
1 (15 1/2 ounce) can original sloppy Joe sauce
1 cup shredded Cheddar cheese
1 cup buttermilk baking mix
1/2 cup milk
1 egg

Brown beef and onion in an oven-safe skillet. Drain; Stir in sloppy Joe sauce. Sprinkle on cheese.

In a separate bowl, combine remaining ingredients; stir until blended. Pour over beef mixture. Bake at 400 degrees F for 30 minutes until golden brown.

Serves 6.