Many say Syd's serves the best dogs in Jersey.  I'd say it's a tie between Syd's and the Rutt Hutt.  While the Rutt Hutt fires their dogs, Syd's takes a foot long all beef dog and char grills it.  Word has it they also serve outstanding hamburgers and onion rings.  I will be making a return trip soon to find out. 

Note:  Syd's has moved to the new location, listed above.  All the picks are from their former location in Union.  Word has it their dog is still great.