Vegetarian Sliders with Black Beans, Chard & Poblanos
These vegetarian sliders are filling, flavorful and make for a great protein-packed main dish. Take your time patting the beans dry: it keeps the sliders from falling apart. You can make 8 larger patties, to fit regular-size buns, but try to keep them about 1/2 inch thick so they'll heat through under the broiler without burning.
To make ahead: Refrigerate pickled onion (Step 1) for up to 2 days.