A few years back, if you were cool enough to have Ben Sargent’s digits in your phone, then chances are you were among the enviable few who could call to get handmade lobster rolls crafted by the chef/handyman extraordinaire, and delivered to your doorstep by his gangster alter ego, Dr. Klaw. The shellfish sammies, prepared inside Sargent’s Greenpoint basement apartment, were held in such high esteem that he garnered not just a cult following, but a media frenzy, and subsequently a Health Department party poop.