I like to serve my quesadillas with fresh guac.
1 small onion (chopped)
1 small tomato (chopped)
juice of 1 lime
1/2 tsp. cumin
dash of salt
handful of chopped fresh cilantro
Mash the avacados, and add all other ingredients and VOILA!
Helpful hint: to keep your guac from browning you can keep the avacado pit in your guac until you serve it.