Questlove just released his fifth book, Mixtape Potluck, which also happens to be his first cookbook. It's a collection of recipes from his friends—chefs, musicians, entertainers, and artists—and meant to inspire the kind of potluck-style dinner parties he hosts. He swung by to talk about what went into making the book, how food and creativity overlap for him, and, of course, his favorite Philly cheesesteak spots.