Prepare the Puff Pastry:

1. Preheat the Oven: Preheat your oven to 400°F (200°C).
2. Roll Out the Puff Pastry: On a lightly floured surface, roll out the puff pastry sheet to about ¼-inch thickness.
3. Cut the Christmas Tree Shape: Using a sharp knife or a cookie cutter, cut the puff pastry into the shape of a Christmas tree. You can make one large tree or several smaller ones depending on your preference.

Assemble the Pizza Bites:

4. Add the Sauce: Spread a thin layer of marinara sauce on the base of each Christmas tree shape, leaving a small border around the edges.
5. Layer the Cheese and Toppings: Sprinkle shredded mozzarella cheese over the sauce, then add your favorite pizza toppings such as pepperoni, olives, or bell peppers.
6. Top with Another Layer of Pastry: Place a second tree-shaped pastry on top of the filling, pressing the edges gently to seal the edges together. Use a fork to crimp the edges for a decorative touch and extra sealing.

Bake the Pizza Bites:

7. Egg Wash: Beat the egg in a small bowl and brush it over the top of the assembled pastry trees to give them a golden, shiny finish.
8. Bake: Place the pastry trees on a baking sheet lined with parchment paper and bake for 12-15 minutes, or until the pastry is golden and puffed up.
9. Cool and Garnish: Remove from the oven and let cool for a few minutes. Garnish with fresh basil or parsley leaves for a pop of color and added flavor.

Serve:

10. Cut and Serve: Slice the pizza bites into individual pieces and serve warm as a delightful appetizer.