We provide you with the best recipe for making sweet pastries. These Apple and Dulce de Leche Pastries are very easy to make. You can either make the puff pastry from scratch or buy it ready to bake. The origin of pastries is uncertain, although the combination of these Apple and Dulce de Leche Pastries is traditional in Argentina. It is believed that pastries in this country originated from the Arab and Jewish heritage of Fatay or Lajmayín, triangular-shaped pastries.