James Beard Award Winner: A cultural history and culinary travelogue from "the M.F.K. Fisher of pickled meats" (A. J. Jacobs). These days there are very few places you can get authentic hot pastrami sandwiches, delicious matzo ball soup, and chewy, crusty rye. In this travelogue, die-hard delicatessen lover David Sax searches out the best Jewish delis around the United States—and the world—…