Thaw pie dough in refrigerator overnight.
Preheat oven to 400F.
Place parchment on (or grease) two half-sheet pans.
In a medium bowl, mix together pumpkin puree, butter, cinnamon, pie seasoning, allspice and sugar. Set aside.
Dust a flat surface with flour, roll pie crust out to 1/8 inch thick, and cut into 4-inch circles (or larger, if you prefer) with a pastry cutter or edge of a glass.
Spoon out 1/2 teaspoon or less of the pumpkin mixture onto one side of the dough circles, fold over to create half-moons, and crimp the edges closed. Cut a small lightning bolt into the top of each to vent.
Transfer pasties to baking sheets, and brush each with egg wash.
Bake for about 15-20 minutes until lightly golden.
Transfer to a cooling rack and let cool for 5 minutes before devouring.