In a skillet over medium heat, add a splash of olive oil and sauté the sliced bell pepper and onion until they are softened, about 5-7 minutes. Season with cumin, chili powder, salt, and pepper.
In a large bowl, combine the shredded chicken, sautéed vegetables, corn, black beans, and salsa. Mix thoroughly until well incorporated.
In a greased 9x13 inch baking dish, spread half of the tortilla strips evenly across the bottom. Pour half of the chicken mixture over the tortillas, then sprinkle with 1 cup of shredded cheese. Repeat the layering with the remaining tortilla strips, chicken mixture, and top with the remaining cheese.
Cover the dish with aluminum foil and bake in the preheated oven for 20 minutes. Then, remove the foil and bake for an additional 10-15 minutes, or until the cheese is bubbly and golden brown.
Once baked, remove from the oven and let it cool slightly. If desired, garnish with fresh cilantro before serving.