01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - Unroll the puff pastry sheet on a lightly floured surface.
03 - Brush the entire pastry surface with melted butter, then sprinkle granulated sugar evenly across.
04 - Distribute chopped chocolate over the pastry, maintaining a 3/4-inch border along one long edge.
05 - Roll the pastry tightly starting from the opposite long edge into a log shape. Seal the edge with water.
06 - Slice the roll into 8 equal pieces. Place on prepared baking sheet with spiral side facing up.
07 - Brush tops with beaten egg. Sprinkle sliced almonds if using.
08 - Bake for 18-20 minutes until golden brown and puffed.
09 - Cool briefly on wire rack. Dust with powdered sugar before serving if desired.