Mayor de Blasio tries to explain NYC ranked-choice voting using pizza toppings, vegan cheese Few things are as controversial to New Yorkers as pizza. Given Mayor de Blasio’s penchant for eating pizza with cutlery resulting in 2014′s Forkgate, it was déjà vu all over again when he suggested vegan cheese and clams as potential pie toppings in an ill-fated effort to explain the newfangled ranked-choice voting system for New York City primary election on June 22. Hizzoner unveiled a bizarro chart of add-on’s as he tried to demonstrate how New York voters might negotiate the little-understood system that will be used to pick his successor on Election Day.