Unroll the puff pastry sheet onto a piece of parchment paper.
Gently roll it out into a large rectangle using a rolling pin. Sprinkle a little flour on top if the rolling pin sticks to the dough.
Spread pizza sauce down the center of the pastry, leaving space on the sides.
Layer the mozzarella cheese over the sauce.
Add the sliced pepperoni on top.
Using a pizza cutter or sharp knife, cut the pastry into diagonal strips along both sides of the toppings.
Fold the strips over the center, alternating sides to form a braid.
Brush the braid with the beaten egg, then sprinkle extra Parmesan cheese and Italian seasoning on top.
Carefully lift the parchment paper and transfer it to a baking tray.
Bake in the preheated oven for 20-25 minutes, or until the puff pastry is golden brown and flaky.
Cut into slices and serve warm with extra pizza sauce on the side.
Notes
Storage Tips: Refrigerate: Store leftovers in an airtight container in the refrigerator for up to 3 days.Freezer: I do not recommend freezing this recipe.Reheating Tips: Reheat in the oven or toaster oven at 350°F (175°C) to maintain crispness.