01 - Preheat oven to 375°F. Lightly grease a 9x13-inch casserole dish.
02 - In a large mixing bowl, stir together the shredded chicken, black beans, corn, red onion, garlic, half of the Monterey Jack cheese, cumin, chili powder, salt, and pepper until evenly combined.
03 - In a separate bowl, whisk the salsa verde and sour cream together until smooth and well blended.
04 - Spread a thin, even layer of the salsa verde sauce across the bottom of the prepared casserole dish.
05 - Arrange half of the corn tortilla strips evenly over the sauce. Spread half of the chicken mixture over the tortillas, then drizzle with additional salsa verde sauce.
06 - Repeat the layering with the remaining tortilla strips, the rest of the chicken mixture, and the remaining salsa verde sauce.
07 - Sprinkle the remaining Monterey Jack cheese evenly over the top of the casserole.
08 - Cover the dish tightly with aluminum foil and bake for 25 minutes.
09 - Remove the foil and continue baking for 10 minutes, or until the cheese is bubbly and lightly golden on top.
10 - Let the casserole stand for 5 minutes before slicing. Garnish with fresh cilantro, avocado slices, and lime wedges if desired. Serve warm.