In a 9×13 baking dish, lay tortilla chips on the bottom. Gently press down on them to break them into bite-size pieces. Pour cooked meat mixture evenly over the top. Sprinkle evenly with shredded cheddar cheese. Bake, uncovered for 15-20 minutes, or until cheese is melted and bubbly. Remove from oven, and let stand 5 minutes before slicing. Top with favorite toppings!