“Fast-casual pizza has taken the world by storm,” says Sanjay Gummalla, vice-president of regulatory and technical affairs for the American Frozen Foods Institute. Over the past few years, a growing number of restaurants offering quickly cooked pizzas made right in front of consumers have popped up around the United States. Similar to Chipotle, these restaurants display all their ingredient options behind a glass counter, and consumers can opt either to build their own pie or choose …