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. Cook onion and red bell pepper for 3-4 minutes until softened. Add garlic and cook 1 additional 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 to meld 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 incorporated.
05 - Spread a thin layer of creamy sauce across the bottom of the prepared baking dish. Arrange 4 tortillas over the sauce, overlapping slightly to cover the surface.
06 - Spread half of the chicken and bean mixture over the tortillas. Drizzle with one-third of the creamy sauce and 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 sprinkle with 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 until heated through and bubbly around edges.
10 - Remove foil and return to oven for 10 additional minutes until cheese is melted, bubbly, and lightly golden on top.
11 - Allow lasagna to rest for 10 minutes before slicing to set layers. Garnish with fresh cilantro and serve warm.