Preheat your oven to 350°F (175°C).
In a large mixing bowl, combine the shredded chicken, cottage cheese, black beans, corn, chili powder, cumin, garlic powder, salt, and pepper. Mix until well combined.
In a 9x13-inch baking dish, spread half of the enchilada sauce on the bottom.
Layer half of the cooked rice or quinoa over the sauce.
Spoon the chicken and cottage cheese mixture evenly over the rice.
Pour the remaining enchilada sauce over the top of the chicken mixture.
Sprinkle the shredded cheddar cheese evenly over the sauce.
Cover the baking dish with aluminum foil and bake for 20 minutes.
Remove the foil and bake for an additional 10 minutes, or until the cheese is bubbly and golden.
Remove from the oven and let cool for a few minutes. Top with diced avocado and chopped cilantro before serving.