01 - Preheat oven to 375°F. Grease a 9x13-inch baking dish with cooking spray or butter.
02 - Heat olive oil in a large skillet over medium heat. Sauté diced onion and red bell pepper 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. Mix well and cook for 2 minutes to blend flavors. 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 fully 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 - 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 the cheddar and Monterey Jack cheeses.
07 - Layer with another 4 tortillas. Spread remaining chicken mixture over tortillas. Drizzle with another third of the sauce and sprinkle with another third of the cheeses.
08 - Top with remaining 4 tortillas. Spread remaining sauce evenly over the top. Sprinkle with remaining cheeses.
09 - Cover baking dish tightly with aluminum foil. Bake for 25 minutes.
10 - Remove foil and bake for an additional 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.