BROWN meat with green peppers, onions and garlic in large skillet.
STIR in tomatoes, steak sauce, taco seasoning mix, cumin and red pepper. Bring to boil. Reduce heat to medium-low; cover. Simmer 10 to 15 min., stirring occasionally.
MEANWHILE, prepare corn muffin mix with milk and egg as directed on package for muffins. Drop 8 mounds of batter onto chili mixture; cover. Simmer 10 min. (Do not lift lid.) Serve topped with cheese and onions.