Italian Hot Dogs are unique to North Jersey.  They are the hot dog of my youth.  Rumor has it that Jimmy Buff's invented them.  An Italian hot dog goes on a quarter of a large roll of Italian bread (sort of a fat pita).  The dog is grilled and then topped with sautéed onions, peppers and potatoes.  You can also order a double, which is two dogs on a half a roll.  That's an Italian Sausage Sandwich next to the dog.  Same principle, but sausage instead of a hot dog.  I actually prefer the Italian Sausage.  The various greases pair off better.

There are a few Jimmy Buff's around North Jersey.  I happened upon this one, in North Arlington.