Step 1: Preheat your oven to 350°F (175°C) to ensure even baking.
Step 2: In a large mixing bowl, combine the shredded chicken, black beans, corn, enchilada sauce, salsa, cumin, garlic powder, onion powder, salt, and pepper. Stir until well mixed.
Step 3: In your greased 9x13 inch baking dish, layer half of the corn tortilla strips on the bottom. Spoon half of the chicken mixture over the tortillas, followed by a layer of cheddar and mozzarella cheese. Repeat with the remaining tortilla strips, chicken mixture, and top with the rest of the cheese.
Step 4: Cover the baking dish with aluminum foil and bake for 25 minutes. Remove the foil and bake for an additional 10-15 minutes, or until the cheese is bubbly and golden.
Step 5: Let the casserole cool for a few minutes. Garnish with fresh cilantro if desired, then serve warm.