Brad Hartman is executive chef of 613 Catering at the Jewish Community Center. (Photo: Bill Motchan) When Brad Hartman talks about food, he doesn’t talk about limitations. He talks about possibilities. This is, after all, a chef whose culinary journey has taken him from a high-end gourmet shop on Manhattan’s Upper West Side to the Arizona desert, from hand-making Northern Italian pasta to cooking shakshuka in Israel’s Negev.