Writer John T. Edge is a professional “observer of the South,” and in The Potlikker Papers, his “food history of the modern South,” he looks at the ways in which the region’s culinary traditions are inextricably linked with its history. On this week’s Upsell, he chats with Helen and Greg about the restaurants that fail to acknowledge the South’s troubled past, his vision for a multi-cultural future, and why food is power.