These pastries are filled with blood sausage and a dollop of pear and port jam, which you will need to prepare before getting started. Or, if you prefer, you can buy a high-quality flavorful jam instead of making it yourself; pear jam, quince jam, or fig jam would all pair perfectly with the robust sausage. Puff pastry is a convenient shortcut and bakes up flaky and golden and buttery good.