Remove the yellow outer peel of the lemons with a potato peeler, avoiding the white interior.
Cut the lemon peels into thin strips and soak them in alcohol in a large glass container with a lid.
Add optional olive leaves for extra flavor.
Let the mixture rest for about 20-30 days.
Prepare a syrup by dissolving sugar in water over the stove, then let it cool.
Add the syrup to the alcohol and lemon peels.
Let it rest for another 30 days, then strain the limoncello before pouring it into bottles.
