Sister Marie Pappas, 62, is a kind and energetic nun who lives in a convent in Hopewell Junction, N.Y. She has dedicated her life to her faith and to teaching young people about religion. It's a Hawaiian-themed dinner at the convent, and Sr. Marie and her fellow nuns teach Mo Rocca how to prepare grilled chicken with pineapple and a pineapple cake that could be described as heavenly. Sr. Marie also has Mo as a guest on her weekly radio show.