Preheat oven to 180˚C.
Place Dr. Oetker Nona Tarts, butter and egg in a mixing bowl. Mix well.
Roll the dough to ball (approximately 2.5cm diameter), flatten the dough-ball to 0.5cm thickness.
Roll Dr. Oetker Nona Pineapple Paste to ball (approximately 2cm diameter), place it in the middle of flattened dough and wrap it up.
Place the dough-ball in small paper cup. With a fork, press rose petals (see diagram) into the top using the tip of a fork.
Place on baking tray and garnish with egg yolk.
Bake at 180˚C for 15 minutes or until golden brown.