Preheat the oven to 350°F

Cook the ground beef and diced onion in a large skillet breaking up the meat until no longer pink

Add the taco seasoning Rotel black beans refried beans and enchilada sauce

Cook over medium heat for a few minutes until heated through

Spread a small amount of the meat mixture in the bottom of a 9x13 inch casserole dish

Cut the tortillas in half then cut two of the halves in half again

Arrange two tortilla halves in the bottom of the dish with the rounded edges toward the center

Fill the top and bottom gaps with a quarter piece of tortilla

Spread one third of the meat mixture over the tortillas

Sprinkle one third of the shredded cheese on top

Repeat the tortilla meat and cheese layers once more

For the final layer place four tortilla halves across the top

Add the remaining meat mixture and finish with the remaining cheese

Cover with foil and bake for 30 minutes

Remove the foil and broil for a few minutes until the cheese is bubbly

Remove from the oven and top with sliced green onions

Let rest for 5 minutes before cutting and serving