Preheat the oven to 180 degrees Celsius (350 Fahrenheit).
To make the dough, use a hand mixer or the kitchen aid to mix the eggs and sugar until they triple their volume and they have a and light-yellow colour.
Add the oil, and mix well again.
Add the vanilla extract, baking powder and sifted flour, and mix to form a dough. - add a bit more flour if the dough is still very sticky.
Use your hands to shape small balls about the size of a walnut.
Line 2 baking trays with non-stick perchament paper, then arrange the balls onto it.
Bake for about 18-20 minutes until no longer soft, then remove from the oven and leave to cool down completely.
Use a sharp knife to scool out the centre of each cookie.
Fill each cookie with maramalade, and sandwich two together to make a peach cookie.
In one cup of milk, add the yellow food colouring, and in the second the red one.
Dip each cookie into each bowl of milk, then toss into the granulated sugar.
Decorate with mint leaves, and leave to dry before serving.