01 - Preheat oven to 375°F. Lightly grease a 9x13-inch baking dish with cooking spray or oil.
02 - Heat olive oil in a large skillet over medium heat. Add diced onion and red bell pepper, sautéing for 3-4 minutes until softened. Add minced garlic and cook for 1 minute until fragrant.
03 - Add shredded chicken, black beans, diced green chiles, and taco seasoning to the skillet. Stir thoroughly to combine and cook for 2 minutes. Remove from heat.
04 - In a large mixing bowl, whisk together sour cream, cream of chicken soup, milk, cumin, paprika, salt, and black pepper until smooth and well combined.
05 - Spread a thin layer of the creamy sauce on the bottom of the prepared baking dish. Arrange 4 tortillas over the sauce, overlapping as necessary to cover the surface.
06 - Spread half of the chicken and bean mixture evenly over the tortillas. Drizzle with one-third of the creamy sauce. Sprinkle with one-third of each cheese.
07 - Add another layer of 4 tortillas. Spread remaining chicken mixture over tortillas. Top with another third of sauce and another third of cheeses.
08 - Arrange remaining 4 tortillas on top. Cover with remaining sauce and sprinkle with remaining cheeses.
09 - Cover baking dish tightly with aluminum foil. Bake for 25 minutes.
10 - Remove foil and continue baking for 10 minutes until cheese is bubbly and golden brown.
11 - Let lasagna rest for 10 minutes before slicing to set. Garnish with fresh cilantro and serve warm.