"UPDATE: A single recipe of this soup doesn't make a whole lot - I always double it for our family of seven (five kids, two adults). Of course, it goes a bit further if adding on toppings so keep that in mind. Originally the recipe was posted with mozzarella cheese. It's very yummy that way and occasionally I still use it but for the most part, I've changed to using Monterey Jack for a much creamier and smoother texture. Incidentally cheddar doesn't seem to work well here - it is a bit to greasy and doesn't melt well.Also, the salsa in this recipe is quite important - use a salsa that has great flavor as it is a key component to the soup. A salsa with a lot of heat is obviously going to make the soup spicy. I like to use a mild or medium salsa (Trader Joe's chunky sals or fire-roasted salsa are two of my favorites). And if you want to change it up a bit, using a green salsa is a wonderful variation. You can probably tell this soup is endlessly adaptable. Don't forget that leftover, cooked turkey is delicious in this soup. Another note - I often sub celery seed (just 1/4 teaspoon) for the celery salt and then just add additional salt to taste if needed...."