After you've done fried a couple turkeys and born witness to deep-fried pepperoni, there aren't too many things that get thrown into a deep fryer that will shock you. Nevertheless, shocked is how I felt walking into Jimmy Buff's last week and watching them prepare a double Italian Hot Dog when Carey and I were touring around New Jersey in the Serious Eats Explorer (thanks Ford!). That would be two skinless franks, deep-fried until bursting, stuffed into a split loaf of "pizza bread" smeared with mustard, topped with fried onions and peppers, and fat disks of fried potato.
'Jimmy Buff's' on Serious Eats
I go back and forth on whether hot dogs are, in any way, sandwiches. (My instinct says no, but I consider a lobster roll a sandwich, and that's stuff-on-a-long-bun too, right?) But if any hot dog is a sandwich, it'd be the "Italian Hot Dog," as done at New Jersey institution Jimmy Buff's.
Jimmy Buff's in New Jersey is known for inventing the Italian Hot Dog, but they also make a killer cheesesteak piled high with deep-fried potatoes.