Mix flour and sugar on a flat surface and make a well in the middle.
Chop the butter and add it to the well.
Open the egg, beat it in a small bowl, and add it to the well.
Kneat all the ingredients to obtain a uniform dough.
Roll out the dough in between two baking papers and leave to rest in the fridge for 30 minutes.
Take the dough from the fridge and put it into a baking pan keeping the baking paper underneath. Remove the dough in excess from the sides and save it for the stripes.
Use the fork end to pierce the dough.
Spread uniformly the jam on the dough.
Use the fingers to fold the dough in excess on the sides.
Roll out the saved dough and use the knife to cut it into stripes.
Arrange the stripes on the jam.
Bake for 40 minutes in a 180° static oven.