Photo by Michael Graydon + Nikole Herriott, food styling by Andy Baraghani, prop styling by Kalen Kaminski
Macerating red onions in balsamic vinegar with a big pinch of sugar helps soften the onions and sweetens them right up. Serve these sliders alongside a picnic menu of shrimp empanadas, grain salad with tomatoes, and Italian sundaes with Nutella.