01 - Preheat oven to 400°F and line a baking sheet with parchment paper
02 - Unroll thawed puff pastry sheet on a lightly floured work surface
03 - Spread raspberry preserves evenly over pastry, leaving a 1/2-inch border along all edges
04 - Sprinkle fresh raspberries evenly over the preserves if using
05 - Starting from a long side, roll pastry sheet tightly into a log
06 - Cut roll evenly into 8 pieces using a sharp knife
07 - Place slices cut side up on prepared baking sheet, spacing evenly
08 - Brush tops of pastry rolls with beaten egg using a pastry brush
09 - Bake for 18 to 20 minutes until pastry is golden brown and fully puffed
10 - Cool slightly then dust generously with powdered sugar before serving