Jason Dady at City Grit; Gotham's Vegetarian Lunch

• Black Tree on the LES is launching a summer "Slip and Slide-r" happy hour from 4 to 8 p.m. A slider-size sandwich board ($9) offers three sandwiches with daily changing fillings like ale-braised short rib. Chase your sliders with local craft beers on tap ($4) or a glass of wine. [Grub Street] • Momofuku restaurateur David Chang, Andy Ricker of Pok Pok, Carlo Mirachi of Roberta's and Blanca and the Del Posto crew are among the all-star lineup of chefs who'll join Christopher Kostow's Twelve...