For a richer flavor, use homemade chicken stock or bone broth. Feel free to add other vegetables, such as peas, corn, or spinach, during the last few minutes of cooking. If you don't have rotisserie chicken, you can use cooked chicken breast or thighs, shredded or cubed. Adjust the amount of rice and pasta blend to your preference. If you like a thicker soup, use the entire packet; for a thinner soup, use less. A squeeze of fresh lemon juice at the end brightens the flavors of the soup.