Preheat your oven to 375°F (190°C).
In a large mixing bowl, combine the shredded chicken, cottage cheese, black beans, corn, diced tomatoes, cumin, garlic powder, onion powder, salt, and pepper. Mix well until all ingredients are evenly incorporated.
In a greased 9x13 inch baking dish, spread half of the enchilada sauce on the bottom.
Spoon the chicken mixture evenly over the sauce in the baking dish.
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 25 minutes.
Remove the foil and bake for an additional 10-15 minutes, or until the cheese is bubbly and golden.
Let the dish cool for a few minutes before serving. Garnish with fresh cilantro and serve with a dollop of sour cream if desired.