Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish.
In a large bowl, combine the shredded chicken, black beans, corn, green chiles, red onion, garlic, cumin, chili powder, smoked paprika, and a pinch of salt and pepper.
Stir to mix evenly.
In a separate bowl, whisk together enchilada sauce and Greek yogurt until smooth. This will be your creamy enchilada sauce.
Spoon a thin layer of the sauce into the baking dish to prevent sticking.
Layer with half the tortilla pieces, slightly overlapping. Top with half the chicken mixture, then one-third of the cheese, and one-third of the sauce.
Repeat the layers: the remaining tortillas, the remaining chicken mixture, another third of the cheese, and another third of the sauce.
Finish with the remaining sauce and the rest of the cheese on top.
Gently spread the sauce so everything is coated.
Cover the dish with foil and bake for 20 minutes. Remove the foil and bake another 10–15 minutes, until the cheese is melted and bubbly around the edges.
Let it rest for 10 minutes before slicing. Garnish with fresh cilantro.
Add optional toppings as you like.