When most people think "hot dog relish," the first thing that comes to mind is the sweet, green pickle relish you find at the grocery store. And in a lot of places this's exactly what you'll get if you ask for relish on a frankfurter. But there's a lot of areas and unique hot dog joints where "relish" has nothing to do with pickles. And like everything else with hot dogs, relish loyalties are fierce.
'relishes' on Serious Eats
This cucumber relish is sweet and tangy with a nice note of celery and a little bitterness from the mustard seed to really round it out. It's perfect for canning, but there's no reason it can't be used right away—I expect this batch to be gone by the end of a Memorial Day cookout.