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

Sylvia Woods moves to the music outside her restaurant in Harlem neighborhood of New York, during the restaurant's 40th anniversary celebration in 2002. Stuart Ramson/AP hide caption

itoggle caption Stuart Ramson/AP