Peel and blend the tomatoes into a sauce, as described in the post above. Season with good quality EV olive oil and salt to taste.
Drain the mozzarella and shred it with your hands, squeezing out as much water as possible. Set aside in a bowl.
Roll out the puff pastry sheet and using a cookie cutter, cut out as many circles as you can. Transfer them to a sheet pan covered with parchment paper.
With a fork, punch a few holes in the center of each circle.
With a spoon, spread the tomato sauce on the puff pastry circles, then sprinkle the mozzarella on top. Sprinkle some dried oregano on top, to taste.
Add a couple of basil leaves on top, then bake in the preheated oven for about 15 minutes.
They can be served either warm or room temperature.