It's all about the Chicago dog...
Mustard, sweet relish, tomato, chopped onion, pickle spear, sport peppers, and celery salt. No ketchup allowed on Chicago dog.
But the most important part is the dog itself - always Vienna Beef hotdog.
Mmmm - yum!!
If I can't do the real thing (like at a Twins game), I go with ketchup, mustard and sometimes a little bit of relish.