Heat oven to 375°F. In 10-inch ovenproof skillet, cook beef and onion over medium-high heat, stirring frequently, until beef is thoroughly cooked; drain. Reduce heat to medium; stir in taco seasoning mix, corn and tomato sauce. Heat until hot. Stir in cheese cubes.
Separate dough into 10 biscuits; cut each into quarters. Arrange quartered biscuits around outer edge of skillet. Brush biscuits with melted butter; sprinkle with cornmeal.
Bake 18 to 22 minutes or until biscuits are golden brown.