In this video, you’ll see how to make the perfect condiment for summer grilling. This onion relish comes out smoky-sweet and is the perfect condiment for hot dogs and hamburgers, pretty much anything you can throw on the grill. You’ll discover the trick to charring your onions directly in a heap of hot, hot coals. Don't worry if the outside is blackened to hideous proportions, the inside will be roasting to a sweet, smoky perfection. Next you’ll see how to chop everything up and season your relish with spices, olive oil, and sherry vinegar. You can try other acids, if you like, such as balsamic vinegar, lemon juice, rice vinegar, whatever you like! Chef John’s advice? Have some hotdogs standing by for this one! Watch the video, then get the recipe for Chef John’s Black Onion Relish.