1 pound lean ground beef
1 (6-ounce) can tomato paste
1/2 cup chopped Vidalia onion
1/2 cup chopped green bell pepper
1/2 cup quick-cooking oats
1 egg, lightly beaten
1 teaspoon salt
1/4 teaspoon pepper
1/3 cup ketchup
2 tablespoons packed light brown sugar
1 tablespoon Dijon mustard