Line 6 small rimmed baking sheets (or 2 large sheet pans) with tortilla chips. Sprinkle with shredded cheese. Add a second layer of chips and shredded cheese. Top with taco meat.
Bake at 400˚F for 4-6 minutes, or until the cheese is melted.
Top with black beans, diced tomatoes, minced onions, sliced black olives, diced green chilies, sliced green onions, sour cream, and guacamole.