Whatever your recipe for Pie Crust is, it should be good and flaky, even if it's Pillsbury.
Use a bowl or ramekin to cut out circles in the dough. Brush edges with water. Drop a dollop Nutella in the center of each. Fold over to seal with a fork. Prick centers with fork. Place on parchment paper lined cookie sheet. Brush with egg wash. Bake at 350° for 15-20 minutes or until golden.