Bake pastry shells according to package directions. In a large skillet, saute the pears in butter, brown sugar and cinnamon for 5 minutes or until pears are tender. Add the cream. Cook and stir for 2 minutes or until thickened. Gently stir in the raspberries. Remove top of pastry shells; fill with fruit mixture. Garnish with whipped cream and additional raspberries if desired.