Preheat your oven to 375°F (190°C).
Dice the chicken breast into small bite-sized cubes and finely chop the red bell pepper and white onion.
Heat the olive oil in a skillet over medium heat; add the chicken, peppers, and onions, sautéing until the chicken is browned and the vegetables are tender.
In a small mixing bowl, whisk together the tomato puree, chili powder, ground cumin, garlic powder, and sea salt to create a clean-label red chili sauce.
Briefly warm the corn tortillas in a dry pan or microwave for 10 seconds to make them pliable and easy to roll.
Spoon the chicken and vegetable mixture into the center of each tortilla, roll them up tightly, and place them seam-side down in a small baking dish.
Pour the red chili sauce evenly over the top of the tortillas and sprinkle with the shredded cheddar cheese.
Bake for 15 minutes until the sauce is bubbling and the cheese has melted into a golden layer.