Preheat oven to 180˚C.
Place Dr. Oetker Nona Tarts, butter and egg in a mixing bowl. Mix well.
Roll the dough into balls and gently press the dough with your fingers into greased tart mould.
Use a fork to prick the bottom of the tart shells.
Bake at 180˚C for 15-18 minutes or until golden brown, set aside to cool.
Melt cooking chocolate with microwave oven or “double-boil“. Fold in butter and mix with electric mixer until smooth and creamy.
Fill the chocolate ganache into the tarts and garnish with almond nibs.