1. Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.
2. Roll out the puff pastry on a lightly floured surface and cut it into equal-sized squares.
3. Place the pastry squares onto the prepared baking sheet, leaving space between each piece.
4. Spread a thin layer of tomato sauce on each puff pastry square.
5. Sprinkle shredded mozzarella cheese evenly over the sauce.
6. Add slices of prosciutto and salami on top of the cheese.
7. Optionally, sprinkle with herbs like oregano or basil for extra flavor.
8. Bake in the preheated oven for 12-15 minutes, or until the pastry is golden brown and crispy.
9. Remove from the oven and let the squares cool slightly before serving.
10. Serve warm or at room temperature as a delicious holiday appetizer.
11. Optionally, prepare ahead and reheat before serving for convenience.
12. Enjoy with wine or cocktails to enhance the flavors.