01 - Preheat oven to 400°F and line a baking tray with parchment paper.
02 - Unfold puff pastry sheet on a lightly floured surface.
03 - Spread raspberry preserves evenly over pastry, leaving 1/2-inch border along edges.
04 - Sprinkle fresh raspberries evenly over preserves if using.
05 - Starting from long side, roll pastry sheet tightly into log.
06 - Cut roll evenly into 8 pieces.
07 - Place slices cut side up on prepared baking tray.
08 - Brush tops with beaten egg.
09 - Bake 18-20 minutes until golden brown and puffed.
10 - Cool slightly, dust with powdered sugar, and serve warm.