01 - Preheat oven to 375°F. Lightly grease a 9x13-inch baking dish with cooking spray or butter.
02 - Heat olive oil in a large skillet over medium heat. Add diced onion and red bell pepper; sauté for 3-4 minutes until softened. Stir in minced garlic and cook for 1 minute until fragrant.
03 - Add shredded chicken, black beans, 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, ground cumin, paprika, salt, and black pepper until smooth and well combined.
05 - Spread a thin layer of creamy sauce on the bottom of the prepared baking dish. Arrange 4 tortillas over the sauce, overlapping as necessary to cover the surface.
06 - Distribute half of the chicken and bean mixture evenly over the tortillas. Drizzle with one-third of the creamy sauce and sprinkle with one-third of each cheese.
07 - Place another layer of 4 tortillas over the filling. Add remaining chicken mixture, another third of sauce, and another third of cheeses.
08 - Top with remaining 4 tortillas. Spread remaining creamy sauce over tortillas and finish 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 melted, bubbly, and lightly golden.
11 - Let lasagna rest for 10 minutes before slicing to allow layers to set. Garnish with fresh chopped cilantro and serve warm.