
Beat the egg yolk with sugar, add the butter cut into small pieces, the flour and salt. With your hands quickly work the dough on a work surface so as to form a soft ball. Wrap it in transparent film and refrigerate for at least half an hour. Shape into balls with a diameter of 2.5 cm. Keep the ball in the palm of one hand and with one finger of the other hand press to form a small bowl. Place the small 'pastry bowls' on a baked sheet paper and bake for 10 minutes maximum at 170°C. Now fill them with your favorite jam. Bake for about 20 minutes at 170°C. They are ready to serve with your favourite drink!