Take puff pastry out of the freezer and let it defrost for about 20 minutes. Preheat oven to 365F.

In the meantime, make the filling: grate the feta cheese into a bowl, add 1 egg, melted butter, garlic, and herbs. Mix well to combine.

Roll out the pastry sheets to a rectangular shape. Cut each sheet into 6 squares. Put 3 T of filling in the middle of each square and fold it up (like a dumpling), pinching the sides and the top.

Spread the cheese and herb puffs out on a baking sheet - you will likely need two - lined with baking paper.

Brush with egg wash and bake for 20-25 minutes until opened up and golden.