Wrap the tortillas in foil and heat in a 350F (180C) oven until heated through, about 15 minutes.
12 large Flour tortillas
Meanwhile, heat the oil in a large skillet over high heat and saute the chicken, onion, and bell peppers until the chicken is cooked and the vegetables are tender, about 5 minutes.
2 tbsp vegetable oil, 1 whole onion, 1 whole green bell pepper, 1 whole red bell pepper, salt, ground pepper
Place 2 or 3 strips of chicken along with some of the onions, peppers, and optional ingredients of your choice on each tortilla and roll, or serve the tortillas, cooked ingredients, and toppings for diners to assemble themselves.