Preheat oven to 400 degrees F.
In a small bowl whisk the egg and water together.
Use a 3 inch round cookie cutter to cut out rounds from the puff pastry. Save scraps for later.
Place one slice of pepperoni and 1 Mini Babybel on a puff pastry round.
Use a pastry brush to apply egg wash around the outside edge of the puff pastry and then place another puff pastry round on top.
Cut out small triangles and mouths for pumpkins, or long strips of puff pastry for mummies and use these to decorate the top of the puff pastry.
Brush egg wash over the top of the puff pastry and place on lined baking sheet.
Repeat steps until you have 6 stuffed puff pastries.
Bake for 20 minutes.
Remove from oven and add edible eyes to the mummies if you made them.