Chili Buns and Pickled Bologna: A 4,000 Mile Road Trip Through Appalachia

Ronni Lundy, author of “Victuals,” eats her way through Appalachia. Also on this week’s show: Mark Kurlansky reveals the shocking, often deadly history of milk; we travel to Genoa to uncover the authentic recipe for Pesto Genovese; and Dr. Aaron Carroll talks trans fats and health.