Unroll puff pastry if it's rolled and place a little bit of flour on it making sure that the pastry is not sticky. Carefully turn over and place it on a sheet of parchment paper. Lightly cover the puff pastry with flour on the second side.
½ cup all purpose flour
Using a rolling pin, roll out puff pastry to 14" x 10". Section the puff pastry in to 3 sections with the section in the middle being slightly wider than the sides. Cut slits on the sides about ¾" apart right to the edge and all the way through to the bottom.
Mix sauce and olive oil and layer it in the centre of the puff pastry along with mozzarella, pepperoni, olives and parmesan cheese in the centre of pastry and any other filling you prefer.
½ cup mozzarella, 1 cup marinara sauce, 3 tbsp olive oil, 2 oz pepperoni, 10 olives, ⅓ cup parmesan cheese
Brush egg wash along the top and bottom perimeter (not the sides). Start by folding over the top brush some more egg wash on the seam and then fold over the sides one on top of the other.
1 egg
Continue to fold slits on the sides over to enclose sauce mozzarella layer making a crisscross design. Brush the criss cross with egg wash as you move along. When you reach the bottom, fold the bottom over, brush egg wash and bring the sides in one over one another.
Use a fork to seal the dough together on the top and bottom of the puff pastry. Place in 425 degree pre-heated oven for 20 to 25 minutes or until golden brown.
Notes
Top Tip
When you are working with puff pastry, you need to work quickly. The longer the dough stays at room temperature the less it will rise when cooked.Ensure that your oven is pre-heated before you place your puff pastry in the oven because puff pastry needs a high oven temperature in order to bake and "puff".