Mangia! Mangia! Mangia! Celebrity chefs and Cooking Channel personalities are talking about the most sensational Italian food they've ever had. Alton Brown revisits a decadent, old-world pasta dish while Ali Khan chats up his favorite chicken parmigi... (more)ana sandwich. Alex Guarnaschelli then gives a shout out to a not-to-be-missed lasagna and Duff Goldman reveals his pick for the best dish to end a perfect Italian meal.