In a large skillet, over medium-high heat, brown the ground beef with the chopped onion. Preheat the oven to 350 F

Pour in the enchilada sauce, green chiles, and cream cheese, and cook until bubbly

Use half of the corn tortillas to line the bottom of a 9 x 13-inch casserole dish

Add half the can of beans on top of the tortillas

Scoop half the meat mixture on top of the beans

Sprinkle one cup of shredded Cheddar on top of the meat

Repeat these layers: tortillas, beans, and meat. Pour the salsa on top of the last meat layer

Top with the remaining cup of Cheddar cheese and bake for 20 mins or until the cheese is melted and bubbly. Serve with shredded lettuce, sour cream, and sliced black olives