Mix the Bertolli® Creamy Alfredo Sauce with the shredded chicken. Make sure to coat all the chicken with the sauce. Fold in the remaining ingredients. Do not add reserved Parmesan cheese. Pour into a prepared casserole dish. Divide the reserved Parmesan cheese in half and sprinkle one half on top of filling.Remove puff pastry from freeze and let thaw for about 10 minutes before cutting. Cut the puff pastry to the shape of the casserole dish. Place puff pastry on top of casserole filling and sprinkle with second half of reserved Parmesan cheese.Bake in a 425 degree oven for 25 minutes