THAW pastry sheet according to package instructions.
PREHEAT oven to 400ºF.
UNFOLD pastry sheet on floured surface and slice along the seams to make three equal sized sections. Place on two baking sheets lined with parchment paper or silicone baking sheets. Sprinkle cinnamon sugar over the tops of two of the pastry sheet sections.
BAKE 15 or until a golden brown. Move to wire racks and cool completely.
BEAT pudding mix and half-and-half in medium bowl with whisk for 2 minutes. Fold in COOL WHIP. Refrigerate until ready to use, at least 5 minutes.
SPLIT each pastry into two layers so you have six layers in all. Spread pudding mixture on one layer and top with berries. Repeat layers and continue with second dessert, making sure the two sugared layers are on top.
GARNISH with any excess pudding or COOL WHIP and berries.
REFRIGERATE for one hour (or up to four) and use a serrated knife for easier slicing.