For an even richer flavor, consider using homemade chicken stock. You can also add a splash of sesame oil or a dash of chili flakes for extra depth. Feel free to customize this recipe with your favorite vegetables, such as mushrooms, spinach, or bok choy. If you don't have a rotisserie chicken, you can use about 3 cups of cooked, shredded chicken breast or thigh meat instead. Adjust the amount of soy sauce to your liking, depending on the saltiness of your chicken stock.