Amuseables Slice of Pizza is a self-taught food historian and tomato-sauce theorist, best known for his headline lecture Crust and Culture: A Global Journey in Six Cheeses. Fascinated by the sociology of snacking, he can talk for hours about the origins of the margherita. (He once held a four-hour debate on whether crusts count as a border or an invitation.) He's warm, well-read, and always up for a debate - ideally over lunch! And he's got a question for you: to pineapple, or not to pineapple...?