1. Preheat oven to 425°. Cook ground beef in a large skillet over medium-high heat, stirring often, 6 to 7 minutes or until meat crumbles and is no longer pink. Add taco seasoning and 1/3 cup water, and cook 1 to 2 minutes or until thickened.
2. Stir together refried beans and pinto beans.
3. Place 1 tortilla on a lightly greased aluminum foil-lined jelly-roll pan. Top tortilla with half of meat mixture and 1/2 cup cheese; top with another tortilla, half of refried bean mixture, half of enchilada sauce, and 1/2 cup cheese. Top with another tortilla, and repeat layers once. Top with remaining tortilla.
4. Bake at 425° for 16 to 18 minutes or until thoroughly heated and browned. Top tortilla with remaining 1/2 cup cheese; and bake 2 to 3 minutes or until cheese is melted. Cut into wedges, and serve with desired toppings.