Preheat oven to 400 degrees.
In the bowl of a food processor, blend almonds until fine. Add in the honey, butter, and egg yolk and process to form a paste.
On a lightly floured surface, gently roll out the puff pastry dough and cut into 6 rectangles, then halve into triangles. Place a small amount of the almond paste onto the wide end of each triangle and roll up into a crescent shape. Transfer to a baking sheet, brush with egg white, and sprinkle with sugar or almonds if desired.
Bake for 15-20 minutes, or until golden brown.