Preheat your oven to 375°F and lightly grease a small oven-safe baking dish with avocado oil spray.
Finely dice the bell peppers and sauté them in a non-stick pan over medium heat for 5 minutes until tender.
In a medium mixing bowl, combine the cooked shredded chicken breast, sautéed peppers, Greek yogurt, cumin, chili powder, sea salt, and black pepper until well incorporated.
Spread 1 tablespoon of the red enchilada sauce across the bottom of the prepared baking dish to prevent sticking.
Tear the corn tortillas into large, bite-sized pieces; layer half of these pieces evenly over the sauce in the dish.
Spread half of the creamy chicken mixture over the tortillas, followed by half of the remaining enchilada sauce.
Repeat the layers with the remaining tortilla pieces, the rest of the chicken mixture, and the final portion of sauce.
Sprinkle the shredded cheddar cheese evenly over the top layer.
Bake for 18-20 minutes until the sauce is bubbly and the cheese has melted into a golden crust.
Remove from the oven and let it rest for 5 minutes before garnishing with fresh cilantro and serving.