On A Roll Hot Dog cart, serving Hot Dogs and a variety of sausages throughout Southern Maryland. If you're in the mood for a gourmet hot dog loaded with fresh toppings, you're in the right place. In addition to Nathan's Famous Hot Dogs, you're encouraged to try a hot Manger's Half Smoke or a Sweet Italian Sausage, both served in natural casing and direct from Baltimore, or a Johnsonville Bratwurst that's been par-boiled in beer and browned on the grill.