Preheat oven to 400 degrees F. Line a baking sheet with parchment paper and set aside.
On a lightly floured surface, unfold the pastry. Using a 3-inch round cookie cutter, cut out 8 or 9 rounds; place rounds on the prepared baking sheet. Prick the pastry rounds all over with a fork. Sprinkle each with about 1/2 teaspoon Parmesan. Bake rounds for 5 minutes. Remove from oven.
Top each tart with a slice of tomato, basil leaf and mozzarella slice. Bake for 10 minutes or until puffed and golden. Season with salt and pepper, to taste, and serve.
Recipe courtesy of The Deen Brothers