Preheat oven to 400F. Keep the Puff Pastry sheet out to thaw.
Once the Puff Pastry Sheets are thawed, roll them out on a parchment paper with some flour sprinkled on it. Cut the rolled out sheet into 4 parts.
Spoon 2 tablespoon of your favorite Chocolate Hazelnut Spread on each quarter. Spread the chocolate hazelnut spread on to the Puff Pastry Sheets, leaving some space around the edges. Sprinkle some cayenne on it.
Now, brush some egg wash on these edges and fold them over roughly to resemble a rustic galette. Sprinkle toasted, chopped hazelnuts over the chocolate past and brush egg wash over the exposed Puff Pastry on top. Bake in the oven till golden and flaky, about 20 mins.