THIS is a fricken HotDog.
Anything else is a poor inbred wanna be imitation. Ketchup on a HotDog? In Chicago there are plenty of places that will literaly throw you out the door if you're caught doing this.
o Snappy, natural-casing, all-beef wiener, from Vienna Beef, Red Hot Chicago or a few others, steamed or boiled
o Steamed, high-gluten, poppyseed bun, such as S. Rosen's Mary Ann
o Yellow mustard
o Neon-green sweet pickle relish
o Chopped raw white onion
o Dill-pickle spears
o Fresh, ripe tomato slices or wedges+
o Whole, pickled sport peppers
o Dash of celery salt
o Absolutely no ketchup