Preheat oven to 375°F.
Cook chicken breast until internal temperature reaches 165°F, then shred finely with two forks.
Heat olive oil in a skillet over medium heat and sauté diced bell peppers and onions until tender and fragrant.
In a medium bowl, combine shredded chicken, sautéed vegetables, salt, and pepper.
Briefly warm corn tortillas in a pan or microwave until they are pliable and easy to roll.
Pour a thin layer of red chili sauce into the bottom of a small oven-safe baking dish.
Divide the chicken filling between the tortillas, roll them tightly, and place them seam-side down in the dish.
Pour the remaining red chili sauce over the top and sprinkle evenly with shredded Monterey Jack cheese.
Bake for 15 to 20 minutes until the sauce is bubbling and the cheese has melted into a golden crust.
Garnish with fresh cilantro and serve immediately.