Roll out the puff pastry, place one roll on a parchment paper lined baking sheet.
In a small bowl whisk together the passata, 1 tablespoon of olive oil, oregano, basil and the salt. Leave a ¼ inch boarder around the edge and spread half the puff pastry with the sauce, sprinkle with the grated parmigiano. On the other half, brush with 1 tablespoon of olive oil, top with the prosciutto or ham. Sprinkle the shredded mozzarella/fontina over both fillings.
Place the second puff pastry on top and gently press. Gently press to seal the edges. Chill for 20-30 minutes.
Pre-heat the oven to 375F/190C.
Cut strips one inch wide lengthwise and widthwise, creating one inch squares. Brush the top with milk and bake 20-25 minutes or until golden. Serve warm. Enjoy!
Notes
My puff pastry measured 25x37cm
How to store the leftovers?
Puff pastry appetizers are best enjoyed fresh, but leftovers can be revived in a 350°F oven or air fryer for a few minutes until the pastry is crisp again. Avoid the microwave, it softens the pastry.
Freezing the puff pastry appetizers?
I don’t recommend freezing this one. The tomato mixture can make the pastry soggy once thawed, and the texture isn’t quite the same.