01 -
Preheat the oven to 350°F (175°C).
02 -
In a large skillet over medium-high heat, add the ground beef and diced onion. Cook while breaking the beef into small pieces until browned. Drain the fat once cooked through.
03 -
Add the taco seasoning according to the packet instructions. Stir in the diced green chilies and 1/4 cup of enchilada sauce. Simmer for 5 minutes.
04 -
Add 1/2 cup of enchilada sauce to the bottom of a 9x13-inch baking dish.
05 -
Place two tortillas (or enough to cover the surface) at the bottom of the dish, tearing them if necessary to fit.
06 -
Spread half of the cooked beef mixture over the tortillas. Add half of the pinto beans on top.
07 -
Sprinkle 1/2 cup of cheddar cheese and 1/2 cup of Monterey Jack cheese over the beef and beans. Drizzle 1/2 cup of enchilada sauce on top.
08 -
Add another layer of tortillas, followed by the remaining beef mixture and pinto beans. Sprinkle another 1/2 cup of each cheese and 1/2 cup of enchilada sauce.
09 -
Place a final layer of tortillas on top. Cover with any remaining enchilada sauce and evenly spread the remaining cheese.
10 -
Bake in the preheated oven for 25 to 30 minutes, or until the cheese is bubbly and melted.
11 -
Let the casserole cool for 5 minutes before serving. Optionally, garnish with shredded lettuce, diced tomatoes, diced red onion, and sour cream.