Preheat your oven to 375°F (190°C).
Poach or grill the chicken breast until cooked through, then shred it using two forks.
In a small skillet, heat the olive oil over medium heat and sauté the diced bell peppers and onions until softened and slightly caramelized.
In a mixing bowl, combine the shredded chicken, sautéed vegetables, cumin, chili powder, sea salt, black pepper, and 2 tablespoons of the red chili sauce.
Warm the corn tortillas in a dry skillet or microwave for 15 seconds until pliable.
Place a portion of the chicken mixture into each tortilla, roll tightly, and place seam-side down in a small baking dish.
Pour the remaining red chili sauce over the tortillas and sprinkle with the shredded cheddar cheese.
Bake for 15-20 minutes until the sauce is bubbling and the cheese has melted.
Garnish with a dollop of Greek yogurt and freshly chopped cilantro before serving.