Lightly spray a 9x13" baking dish with non stick spray. Spread 1/2 cup of salsa verde evenly out over the bottom of the dish. Set aside.
1 1/2 cup mild salsa verde
To a large mixing bowl add the chicken, sour cream, beans, corn, pepper, cilantro, remaining salsa verde, and spices. Stir together until the mixture's evenly combined.
3 cups chopped rotisserie chicken, 1 16 oz container sour cream, 1 15 oz can black beans, 1 15 oz can corn kernels, 1 poblano pepper, 1/2 cup cilantro leaves, 1 tsp chili powder, 1 tsp garlic powder, 1 tsp ground cumin, salt & pepper
Spread 1/4 of the sliced tortilla in an even layer over the salsa verde covered dish. Add 1/3 of the chicken mixture to the dish, and using a spatula carefully spread it out into an even layer overtop the tortillas. Spread 1/3 of the shredded cheese evenly out overtop.
7 soft taco size flour tortillas, 3 cups shredded Mexican blend cheese
Spread another 1/4 of the tortillas over this mixture to form an even layer (these are like your noodles in a traditional lasagna). The layer doesn't have to be perfect, but spread them evenly to cover the best you can. Add another 1/3 of the chicken mixture, carefully spreading it out into an even layer over the tortillas. Spread another 1/3 of the shredded cheese evenly out over top.
Add another 1/4 of the cut tortillas to cover, followed by the remainder of the chicken mixture spreading it out into an even layer. Layer the remaining tortillas out evenly over top of this. Spread the rest of the cheese evenly out overtop.
Bake the lasagna at 350° for 30 minutes.
Let the cooked lasagna rest for 5 minutes. Top with your desired toppings, and then slice & serve.