When you were a kid, Bubbe used to tell you stories about all the food she would buy from street vendors in New York City - hot dogs, pizza, pastries, pretzels and knishes. Oh, the knishes. The knishes were her favorite. They were the perfect snack - compact, tasty, and filling. Truly an eat-on-the-go food. Her favorite was the meat knish (especially from the vendor near Prospect Park), but any flavor would do in a pinch. Sometimes she ate them hot, sometimes she ate them cold, but she always ate them with a touch of spicy mustard.