This trip, Guy's parking the Camaro in Beantown for an all-Boston smorgasbord. Just outside the city in Allston, two restaurants sharing one kitchen cooking up totally different menus; Mexican street food on one side and gastropub standouts, like killer gravlax and dynamite chicken sausage, on the other. Then in South Boston, the authentic Polish restaurant dishing out righteous pierogi and an old-country fried pork favorite.