This trip Guy's pulling in for a world of flavor. In Falls Church, Va., a South American joint attached to a motel where the Venezuelan sandwich comes loaded with shredded beef, black beans and cheese, or chicken salad. In Nashville, an Italian place where the chef and his wife compete to roll the thinnest fettuccini, then serve it up with home made vodka sauce. And in Sherman Oaks, Calif., some hard-core Triple-D fans show Guy their favorite spot for real deal German bratwurst.