Preheat the broiler. Spray a baking sheet with nonstick cooking spray. Place 4 tortillas on the baking sheet and heat on the center rack in the oven for 4 minutes (keep an eye out so they don't burn or brown too quickly!)
Remove the baking sheet from oven and turn the tortillas over. Spread each tortilla with ¼ cup refried beans and top with ¼ cup cheese. Bake until the cheese is hot and bubbling and the tortillas are crisp, 5 to 7 more minutes (again, keep an eye on them!) Repeat with the remaining tortillas.
Serve immediately, topping each tortilla with lettuce and desired toppings-- tomato/salsa, sour cream and avocado/guacamole.
Notes
*Have leftover taco meat or chicken? Add some on top to make this meal more substantial.
*This recipe is gluten-free adaptable- use GF corn tortillas instead of flour, and make sure that the refried beans and salsa that you're using do not contain any gluten.