From the McIlhenney website. This is an easy multi-purpose dip/sauce for tacos, tostadas, chips, etc. Try a dollop in a serving of black beans! If you cannot find queso fresco, cotija is more widely available. Cotija is a saltier cheese however. A good substitute would be equal parts (approximately) of cotija or feta and cottage cheese to reduce the saltiness. If you don't like the texture of cottage cheese, it can be pureed.