The only woman to wear the "Iron Chef" logo, Cat Cora melds her Greek and southern heritage at the cutting board, where she concocts bold flavors on the Food Network show. She jazzes up her dishes with one of her favorite condiments -- her grandmother Alma's hot sweet mustard. When she isn't in the kitchen, Cora volunteers as a nutritional spokesperson for UNICEF and heads the organization Chefs for Humanity. (Courtesy Food Network)