Preheat your oven to 375°F and lightly grease a small oven-safe baking dish.
Heat the olive oil in a skillet over medium heat and sauté the diced red onion and bell peppers until they are tender and slightly caramelized.
In a mixing bowl, combine the shredded cooked chicken with the sautéed vegetables, sea salt, black pepper, and half of the cumin and chili powder.
In a small saucepan, whisk together the tomato puree, garlic powder, and the remaining cumin and chili powder, simmering for 3 minutes to develop a smoky flavor profile.
Warm the corn tortillas slightly in a dry pan to make them pliable, then dip each tortilla into the red chili sauce to coat both sides.
Fill each tortilla with the chicken and vegetable mixture, roll them tightly, and place them seam-side down in the prepared baking dish.
Pour the remaining red chili sauce over the top of the tortillas and sprinkle evenly with the shredded cheddar cheese.
Bake for 12 to 15 minutes until the cheese is bubbly and the edges of the tortillas are slightly crisp.