MAKE ONE GIANT PIE INSTEAD OF INDIVIDUAL PIES: Pour the entire beef stew mixture into a 9x13 baking dish. You only need one box of puff pastry--slightly overlap the edges of two side-by-side pastry sheets and press the seam with your fingers to seal them together. Place the pastry sheet on top of the baking dish, trim the edges, brush with egg wash, add decorate cookie-cutter pastry shapes and brush them with egg wash, and bake as described above.