Chicago-style hot dog
A Chicago-style hot dog, Chicago dog, or Chicago red hot is a hot dog comprising an all-beef frankfurter on a poppy seed bun, originating in Chicago, Illinois. The hot dog is topped with yellow mustard, chopped white onions, bright green sweet pickle relish, a dill pickle spear, tomato slices or wedges, pickled sport peppers (a variety of Capsicum annuum), and a dash of celery salt.