These flavorful fajitas are a great way to use up leftover rotisserie chicken. Simply shred the chicken and mix it with some fajita seasoning. Sauté some sliced onions and bell peppers in a pan, and add the chicken. Warm up some tortillas, add the chicken and vegetable mixture, and top with some sour cream and guacamole. These fajitas are perfect for a quick and easy dinner.