At least on the west side, buns must be poppy seeded, steamed, and a slice of cucumber in addition to the dill pickle, tomato, green sweet relish French's yellow mustard, onion and celery salt ...hot fries all wrapped up in the same paper and in a small sack, sports are optional......Portillo's, Mickeys...Grew up and lived there for 55 years... alas, I have moved and am in Elvis country 10 years now, ...a culinary waste land.....odd, this is my 1st post...but I feel strongly about Chicago dogs ..oh yeah, has to be a Kosher beef dog...Don't even get me started about Italian beef...p.s . Deep dish isn't pizza.. I suppose I will now have to introduce my self properly..