Bake pastry shells according to package directions; cool completely.
Beat cream cheese and 1 tablespoon sugar in a medium bowl with an electric mixer until creamy; add yogurt, vanilla and lemon zest, beating until smooth. Spoon mixture evenly into cooled pastry shells; refrigerate until ready to serve.
Combine juices and remaining 2 tablespoons sugar in a small saucepan. Bring to a boil over medium-high heat, stirring until sugar dissolves. Reduce heat to medium; stir in blueberries. Simmer 10 minutes or until blueberries begin to pop and sauce thickens; remove from heat and let cool. To serve, spoon sauce evenly over filling in shells.