Preheat your oven to 375°F (190°C).
Poach the chicken breast in simmering water for 12-15 minutes until cooked through, then shred finely using two forks.
Heat the olive oil in a skillet over medium heat and sauté the diced onion and bell pepper until they are soft and translucent.
In a small saucepan, whisk together the tomato puree, chicken broth, chili powder, cumin, garlic powder, sea salt, and black pepper; simmer for 5 minutes to thicken slightly.
In a mixing bowl, combine the shredded chicken with the sautéed vegetables and 2 tablespoons of the prepared red chili sauce.
Briefly warm the corn tortillas in a dry skillet or microwave to make them pliable.
Divide the chicken mixture between the two tortillas, roll them up tightly, and place them seam-side down in a small baking dish.
Pour the remaining red chili sauce over the top of the tortillas and sprinkle evenly with the shredded cheddar cheese.
Bake for 15-20 minutes until the cheese is melted and the sauce is bubbling around the edges.
Garnish with fresh cilantro before serving.