Toss strawberries with sugar; set aside. Unfold pastry and cut in three strips along fold marks, then cut each strip into 3 squares. Place one-inch apart on an ungreased baking sheet and bake at 400 degrees for 15 minutes or until golden. Set pastries aside until cool; then split each one in half. Spread the bottom layers with whipped topping, spoon on strawberry mixture and replace pastry tops. Sprinkle with powdered sugar, if desired.