Tortilla Soup is a delicious and flavorful variety of soup prepared with corn tortilla chips, onion, chicken broth, cooked chicken, avocado, tomatoes, cilantro, and shredded monterey jack cheese. For a beef variation of the tortilla soup, chicken is substituted by its beef counterpart and milk is added to the soup. Tortilla soup is enjoyed as an accompaniment to warm corn bread or tortillas, with chopped fresh avocado, monterey jack cheese, crushed tortilla chips, or green onion garnishings.