Guy Fieri's sampling Northeastern takes on nationwide flavors. First, a funky food truck in Fairfield, Conn., also has a brick-and-mortar joint serving Californian hot dogs and chicken nuggets. Then, a Philadelphia tavern is making savory shellfish and serious strombolis overflowing with flavor. Just around the corner in the City of Brotherly Love, a new American restaurant is plating up elevated pub grub like bratwurst rarebit and real-deal Italian chorizo mussels.