I often make my own broth from simmering a rotisserie chicken carcass. But, I also make my chicken broth sometimes by using Better than Bouillon chicken base from my local grocery store. If using canned broth, be sure it's gluten free. Use vegetable broth for vegetarian/vegan option.
Select your favorite salsa with your favorite level of spiciness. I use either mild or medium red salsa most often. (I always choose one that does not include high fructose corn syrup.) This recipe is especially terrific with organic or homemade salsa.
For draining the tortilla strips, I always place newspaper under one paper towel for extra absorption. (I remember reading that our local newspaper is printed with vegetable-based dyes, so I feel safe doing that.)
This soup can also be served with avocado slices, lime wedges, sour cream, and/or cilantro, if you wish.