David Rheinstrom isn’t a professional chef, but he has been cooking for large groups since he was a teenager. Launch parties, chili cook-offs, themed pizza nights—David’s seen and organized them all. For his day job, David makes educational videos for an edtech nonprofit called Khan Academy—and he produces podcasts and writes children’s books on the side. He lives in Washington, D.C., with his wife, Jillian, and their dog, Phryne.