Mary Giuliani has always prized simplicity, with a twist. Though the New York and Woodstock-based caterer has Bradley Cooper and Matt Damon on her client list, she serves finger foods from her childhood, tacos and mozzarella and, most important for Giuliani, pigs in a blanket, made memorable from attending many bar and bat mitzvahs in her childhood. The result is a menu that, while familiar to anyone, is nonetheless unique to Mary Giuliani Catering & Events. It’s this deceptive simplicity that is the guiding focus for her first book, The Cocktail Party (Ballantine Books, 2015).