Stir together light cream cheese, 1/2 cup powdered sugar, and next 2 ingredients in a small bowl. Spoon cream cheese mixture evenly into pastry shells. Top each with 1 raspberry. Dust evenly with 1 tsp. powdered sugar just before serving.
Orange-Raspberry Bites: Substitute equal amounts orange rind and orange juice for lime rind and lime juice. Prepare recipe as directed.