Prepare a shortcrust pastry with all the ingredients except for the sugar and egg white and chill. Roll the dough into strands about 1 cm thick. Divide into 8 cm long pieces and form an S.
Briefly beat the egg whites with a fork. Insert the top of the S and then dip it in the granulated sugar. Bake the pastries slowly at around 160 ° C for around 10 minutes until they are golden yellow.