Good Food is always there when I need 'em. There salads are out of this world! They are jam-packed with ingredients, and could easily make for two meals if you have any self control. I do not possess this kind of self control, and the nice part about scarfing down something from Good Food is that you don't feel regretful and disgusting afterwards. The prices are reasonable given the large portion size, and the fact that protein (chicken or tofu) is included in the price.
My favorite has been the Lunchtime in Albuquerque salad (w/chicken) - the dressing included is incredible! For a food cart, their service is quick and friendly. One of the best food cart options in Madison - be sure to check them out!