Wash the tomatoes and cut them into slices of about 5 mm and put them to drain on kitchen paper. Salt and pepper to taste.
Cut the mozzarella into slices and leave to drain too.
Preheat the oven to 180 degrees.
Unroll the dough, divide it into 6 equal parts. With the tip of a sharp knife score(it must not be cut) around the edge of each rounds about 1.5 / 2 cm from the edge and, to form a frame prick the center with the prongs of a fork.
Arrange a slice of tomato and two slices of ham on each sheet, leaving the edge free.
Brush the edge with a little oil and bake for about 25/30 minutes. Five minutes before the end, add the diced mozzarella and a few basil leaves cutted.
The puff pastries will be ready when they are golden and the mozzarella melted.
Serve the pastry hot.
Notes
You can keep them in the refrigerator for a couple of days and reheat them in the microwave.