Preheat the oven to 425°F (220°C).
In a large bowl, combine the chopped chicken, green enchilada sauce, 1 cup shredded Monterey Jack cheese, and most of the sliced green onions. Reserve about 2 tablespoons of green onions for garnish.
Lightly coat the bottom of a deep 9×13-inch baking dish with olive oil.
Arrange half of the tortilla chips in the dish.
Evenly distribute the pinto beans over the chips.
Sprinkle with 1 cup shredded cheese.
Pour about ¾ cup of the red enchilada sauce over the layer.
Spread the chicken mixture evenly over the casserole.
Add the remaining tortilla chips on top.
Pour the remaining red enchilada sauce evenly across the casserole.
Finish with the remaining shredded cheese.
Cover tightly with aluminum foil.
Bake for 20 minutes.
Remove the foil and continue baking for about 10 minutes until the cheese is golden, bubbly, and delicious.
Serve the Chicken Chip Bake topped with avocado, sour cream, pico de gallo, cilantro, and the reserved green onions.