Roll out your pie crust or pizza dough. Using a round larger cookie cutter, cut round circles out of the pastry. Then cut them into football shapes. Once you have one, it's easy to use it as a template and cut the rest out. Re-roll the scraps and cut out as many football shapes as you can. On a football cutout, place a couple pepperoni slices, a piece of mozzarella and a little pizza sauce. Brush a little of the egg was around the edges and place another football shaped cutout over the stuffing and seal it by pressing down on the edges. Using a fork, crimp the edges around the pizza pocket and make slits in the top to resemble football laces. Brush the tops of each pizza pocket with the egg was and place them on a baking sheet. Bake in an oven pre-heated to 425 degrees for around 10-12 minutes or until the pizza pockets turn a golden brown. Serve with pizza sauce for dipping.