01 -
Place ground beef and diced white onion in a large skillet over medium heat. Cook until beef is browned and onions are softened, about 6-8 minutes. Drain excess fat.
02 -
Add chopped green chiles and taco seasoning to the skillet. Stir well to evenly incorporate the seasoning.
03 -
Stir in the refried beans until the mixture is uniform and heated through.
04 -
Cut flour tortillas into quarters using a pizza cutter or knife. This step is optional but helps the tortillas layer evenly.
05 -
Lightly grease a 9x13-inch baking dish. Spread a thin layer of enchilada sauce on the bottom. Add a layer of the beef mixture, followed by a layer of tortilla pieces. Repeat layering, alternating sauce, beef mixture, and tortillas, finishing with tortillas on top.
06 -
Pour remaining enchilada sauce over the top layer of tortillas, then evenly sprinkle shredded Mexican cheese blend to cover.
07 -
Preheat oven to 350°F (177°C). Bake uncovered for 20-25 minutes, or until the cheese is melted and bubbly.
08 -
Allow casserole to rest for 5 minutes before serving. Optionally garnish with sour cream, fresh cilantro, diced bell peppers, or other favorite toppings.