Delicatessens are as much a part of New York City as the subways, taxis, and the New York Knicks struggling to have a winning season. There’s Katz’s Deli in the Lower East Side, 2nd Avenue Deli on the east side, and Ben’s Deli in midtown. For a taste of deli, however, that is off the beaten path but very delicious, head to Mile End Delicatessen in...