Got a dream of opening your own restaurant? Start with a pop-up. That’s the savvy direction budding restaurateurs are taking these days, given that pop-ups offer an inexpensive way to test locations, menu items and concepts, generate buzz, build an audience, and gain credibility. Cassie Shortino is following that very path, having recently left her position as the executive chef at Tratto to start Shorty’s Charpit, a pop-up she will hold once or twice a...