As a new documentary shows, a plate of soul food is loaded with questions about history, identity and health. Laylah Amatullah Barrayn/PBS hide caption

itoggle caption Laylah Amatullah Barrayn/PBS

Five days a week, the Peaches & Greens truck sells affordable fruits and vegetables to families on public assistance, people without a car, homebound seniors and even local workers who otherwise would grab fast food or candy for a snack. Carlos Osorio/AP hide caption

itoggle caption Carlos Osorio/AP

Participants, including Mario Batali, right, at the "Eat In," a Food Day lunch event in Times Square in New York on Monday.

Philip Greenberg/Philip Greenberg for Food Day hide caption

itoggle caption Philip Greenberg/Philip Greenberg for Food Day