Bake pastry shells according to package directions. Cool.
In a small glass or ceramic mixing bowl, combine yoghurt, sugar, and raspberry preserves. Place 3 raspberries in the bottom of each pastry shell. Spoon yoghurt mixture over raspberries. Place one raspberry on the top of each dessert. Garnish with additional powdered sugar.
1 10-oz. package puff pastry shells, prepared
