Remove pastry cups from package and break along scored lines. Place cups on an ungreased baking sheet with the circle cut-outs up. Bake 20 minutes, or until golden brown and puffed. Using the end of a wooden spoon handle, press down into centers of hot pastry cups to create fillable centers.
Combine strawberries and granulated sugar in a small bowl and set aside.
Beat mascarpone, 4 tablespoons powdered sugar, vanilla and lemon rind with a mixer until light and fluffy. Spoon mixture into the bottom of pastry cups; top with strawberry mixture. Sprinkle with remaining powdered sugar.