01 - Preheat oven to 400°F and line a baking sheet with parchment paper.
02 - Unroll the puff pastry sheet on a lightly floured work surface.
03 - Spread raspberry preserves evenly over the pastry, leaving a ½-inch border along all edges.
04 - If using fresh raspberries, distribute them evenly over the preserves layer.
05 - Starting from a long side, roll the pastry tightly into a log. Cut the roll crosswise into 8 equal pieces.
06 - Place the pastry slices cut side up on the prepared baking sheet, spacing them 2 inches apart.
07 - Brush the tops of each roll with beaten egg using a pastry brush.
08 - Bake for 18 to 20 minutes until the pastry is golden brown and fully puffed.
09 - Let cool on the baking sheet for 5 minutes, then dust generously with powdered sugar before serving.