In a bowl, combine the eggs and sugar and work them for a few minutes with an electric mixer, or by hand, until the mixture becomes nice and frothy;
Warm the milk, pour in the ammonia and let it dissolve well, you will notice the formation of a dense foam;
Add the ammonia dissolved in the milk, the grated lemon zest and the extra virgin olive oil to the egg and sugar mixture;
Add all the flour (which we have sifted) a little at a time and work the dough with a wooden spoon. You will notice a sticky mixture but that is how it should be;
Fill the pastry bag with a little mixture and on a baking tray lined with baking paper make some sticks, spaced a little apart because they will grow a lot in the oven;
Sprinkle the biscuits with granulated sugar;
Bake the biscuits in a preheated oven at 180 degrees for 15 minutes, until golden;
Remove from the oven and let the biscuits cool thoroughly;
They will remain fragrant for about a week if stored in an airtight container;