"PEPAS" cookies

RECIPE:

Ingredients:

1 egg, 150g of butter, 250g of plain flour, 

100g of icing sugar, the grated skin of an orange.

                                                                          Procedure:
                                            Mix all the ingredients together in a bowl.
                                            Place them in the fridge for about 20 minutes.
                                            Remove from the fridge and make small balls with the dough. 
                                            Place a square of quince over each and set them on a buttered tray.
                                            Cook them in the oven for about 20’ until the bottom is brown.