The regional variations of what should sit atop a hot dog are fascinating. Here in Chicago it's almost a salad: bright yellow mustard, flourescent green pickle relish, tomato wedges, dill spear, spicy little peppers and celery salt. When I first moved here from Milwaukee and saw this garish concoction I thought it was ridiculous -- possibly obscene. (Hey, in Wisconsin, sausage is serious.) No way could it taste good, I thought, but I had to try one. I'm hooked!