In bowl, stir raspberries and 2 tablespoons sugar. In separate bowl, stir blueberries and remaining sugar. Let sit 30-60 minutes.
Beat together cream cheese, powdered sugar, vanilla and milk. Spoon into piping bag and cut off small part of tip.
Bake tart shells according to package directions. Once baked and cooled, fill halfway with cream cheese mixture.
Using small star cookie cutter, cut shapes from apple slices.
Top half of each tart with spoonful of raspberries and other half with blueberries. Top each with apple star and repeat with remaining ingredients.