Prepare tomato vegetable salsa with basil and capers: cut the tomatoes into small cubes, finely chop the basil; combine all the salsa ingredients in a bowl, stir and set aside.
Roll out the puff pastry into a thin square about 3-5 mm thick. Cut into 4 equal rectangles. Place them on an oiled baking sheet.
Grease rectangles of dough with mustard and spread a thin layer of tomato vegetable salsa on top of them (use the remaining salsa as you wish).
Place the baking sheet in a preheated oven, bake the tomato pizza for about 10 minutes.
Remove the puff pastry pizza from the oven, sprinkle with cheese. Bake the cheese pizza for another 8-10 minutes.
Remove the finished puff pastry pizza from the oven, let it rest a little at room temperature, and then cut into strips and sprinkle with chopped cilantro.