Cut the cold butter into cubes, place the butter and the rest of the dough ingredients in a food processor with the plastic blade, and process until a dough is formed. If necessary, add water gradually.
Place the dough on a work surface; Knead for about two minutes; Form a 'sausage' about 22 cm long (8.66 inches); wrap in cling film or baking paper and refrigerate for about an hour until the dough is very cold.
preheat the oven 190 degrees Celsius (375 F).
Slice into 4-5 mm thick slices - it is essential to work with very cold dough.
Place the cookies on a baking tray; no need to grease the pan or line it with baking paper; Make sure to keep a distance of about 3 cm (about 1 inch) between the cookies because they will expand. If you bake the cookies in a standard oven pan - you will probably need two pans.
Place in the center of the oven and bake for 10-12 minutes just until golden. If, after 10 minutes, a wonderful lemon scent spreads in the room - it's time to remove the cookies from the oven! It is essential to make sure that the cookies do not turn brown - although they will be delicious, they will lose their lemon flavor; Allow the cookies to cool completely before dipping them in the chocolate coating.
Dip about 1/3 of the cookie into the chocolate coating, gently shake off the excess and place the cookie on a wire rack so that the part with the chocolate protrudes (see photo); Leave the cookies on the grid until the white chocolate hardens.
Store the cookies in an airtight container out of sight and hope they will last at least one day :)