PREPARATION:
- Preheat oven to 375°F. Cook and stir beef and onion in large skillet over medium heat about 10 minutes or until beef is no longer pink; drain and discard drippings.
- Stir in beans, chilies, if desired, and taco sauce; cook and stir until bubbly, about 4 minutes. Spoon about 1 heaping tablespoon of the beef mixture on top of each tortilla chip; sprinkle with cheese. Place on baking sheets.
- Bake until cheese is melted, about 2 minutes.
