Overlooking the scenic Kennebunk River, at the peak of the summer season, the cooks at the Clam Shack shell roughly 1,000 pounds of local lobster a day. For their assembled-to-order rolls, they pile a little of each part (claw, knuckle, tail) onto an oversize, locally baked burger bun. Customers choose between a swipe of mayo, a drizzle of warm butter or a little of both. The Clam Shack even sells lobster roll kits, shipped fresh overnight. clamshack.net.