If you don't have a pressure cooker, you can also use a rotisserie chicken. Instead of following the pressure cooker directions, start by finely shredding the rotisserie chicken. Then, you'll sauté the onions and garlic in a skillet with a touch of olive oil, adding in the chicken once the onion is softened. You'll then add in the enchilada sauce and all of the seasonings, stirring well to coat.