Combine the lemon peel and vodka in a jar. Cover loosely and let set for a week.

After a week, combine the sugar and water in a large saucepan and bring to a boil without a lot of stirring. Continue to boil for 15 minutes or so until it's like a thin syrup. Let cool to room temperature.

When cool, strain the lemon vodka into the syrup, reserve some of the peels.

Get your bottles ready. Place a couple peels in the bottom and use a funnel to transfer the limoncello into the bottles. Seal and let age for another two weeks.