Roll out the thawed puff pastry into 12" square on a floured surface. Cut into three 4" wide strips.
Spread the strips with Nutella. Brush the edges with beaten egg or water and fold in half lengthwise; press to seal.
Cut each crosswise into 4 pieces.
Place on a parchment-lined baking sheet; cut three slits along the sealed edges of each. Brush with beaten egg (or soy/ almond milk), then press slivered almonds into the pastry for claws.
Freeze for 10 minutes.
Preheat the oven to 400F.
Sprinkle the claws with turbinado sugar and bake for 23~25 minutes or until golden.