A traditional Chicago-style hot dog is made with a beef frank on a steamed poppyseed bun, then topped with chopped onions, tomato, a dill pickle spear, whole sport peppers, celery salt ...

A Chicago-style hot dog starts with mustard, relish, onions, it has two tomato slices, a pickle, two sport peppers, and celery salt. It's synonymous that, Chicago, you don't have ketchup on a hot dog.