Step 1

1 In 10-inch cast-iron or nonstick skillet, cook beef and onions over medium-high heat 6 to 8 minutes, stirring occasionally, until beef is brown; drain. Decrease heat to medium. Stir in taco seasoning mix, red pepper and chiles. Cook 1 to 2 minutes longer or until slightly thickened. Remove from heat; spread beef mixture into even layer.

Step 2

2 Meanwhile, in large microwavable bowl, mix cheeses and milk. Microwave uncovered on High 4 minutes; stir, then microwave in 30-second intervals until cheese melts and mixture is easily stirred smooth. Pour over beef mixture in skillet. Top with tomato, green onions and cilantro. Serve with tortilla chips.