Preheat your oven to 375°F (190°C).
In a large mixing bowl, combine the shredded chicken (or ground beef), black beans, corn, diced tomatoes, chili powder, cumin, garlic powder, onion powder, salt, and black pepper. Mix well to combine.
Spread a thin layer of salsa on the bottom of a 9x13-inch baking dish.
Place 4 corn tortillas over the salsa, slightly overlapping them.
Spread half of the chicken mixture over the tortillas, followed by 1 cup of shredded cheddar cheese.
Repeat the layers: add 4 more tortillas, the remaining chicken mixture, and another cup of cheese.
Top with the last 4 tortillas, the remaining salsa, and the final cup of cheese.
Cover the baking dish with aluminum foil and bake for 25 minutes. Remove the foil and bake for an additional 15 minutes, or until the cheese is bubbly and golden.
Let the lasagna cool for 10 minutes before slicing. Serve with a dollop of sour cream and a sprinkle of cilantro if desired.