01 - Preheat oven to 375°F. Lightly grease a 9x13 inch baking dish.
02 - Combine shredded chicken, 1 cup enchilada sauce, black beans, corn, red onion, cumin, chili powder, garlic powder, salt, and pepper in a large bowl. Mix until well incorporated.
03 - Spread 1/2 cup enchilada sauce evenly across the bottom of the prepared baking dish.
04 - Arrange four tortillas over the sauce, tearing as necessary to cover the bottom completely.
05 - Spread half the chicken mixture evenly over tortillas. Sprinkle with 2/3 cup shredded cheese.
06 - Add another layer of tortillas, then top with remaining chicken mixture and 2/3 cup cheese.
07 - Place final tortilla layer on top. Pour remaining 1/2 cup enchilada sauce over surface. Top with remaining cheese and olives if desired.
08 - Cover with foil and bake for 20 minutes.
09 - Remove foil and bake uncovered for 10 minutes until cheese is bubbly and golden.
10 - Let rest for 5 minutes before adding cilantro, green onions, avocado, sour cream, and lime wedges.