Sloppy Joe Casserole

I recently found this recipe online.  I tried it and it was a big success with my family.  It's very yummy, kid friendly and easy! 

1 lb lean (at least 80%) ground beef

1 medium onion, chopped (1/2 cup)

1 can (15 oz) tomato sauce

1 tablespoon packed brown sugar

2 teaspoons Worcestershire sauce

1 teaspoon yellow mustard

1 pouch (6.5 oz) Betty Crocker® golden corn muffin and bread mix

1/3 cup milk

2 tablespoons vegetable oil

1 egg

1 cup shredded Cheddar cheese (4 oz)

Heat oven to 350°F in 10-inch nonstick skillet, cook beef and onion over medium-high heat 5 to 7 minutes, stirring frequently, until brown; drain. Stir in tomato sauce, brown sugar, Worcestershire sauce and mustard. Cook 2 to 3 minutes, stirring frequently, until boiling; keep warm.

In small bowl, stir corn bread mix, milk, oil and egg just until moistened (batter will be lumpy).

Spoon hot beef mixture into 8-inch square (2-quart) glass baking dish. Sprinkle with 3/4 cup of the cheese. Spoon corn bread batter evenly over top.

Bake 25 to 35 minutes or until toothpick inserted in center of topping comes out clean. Sprinkle remaining 1/4 cup cheese over hot casserole.