I'm in an Italy frame of mind. So I found a recipe for making Limoncello.
Authentic Italian Limoncello
1 liter of Everclear alcohol
10 medium to large lemons
1 1/2 liters of water (6 1/3 cups)
3 lbs of sugar (6 1/2 cups)
Wash the lemons with a vegetable brush and hot water to remove any reside of pesticides or wax; pat the lemons dry. Using a potato peeler, take all the lemon rinds off of the lemons so there is no white pith on the peel. Place the rind-peelings in a large container with the Everclear alcohol. Cover the container and let it sit for seven days.
On the eight day, strain the the peels from alcohol; discard peels.
In a large saucepan, make a simple syrup by combining the water and sugar; let it simmer "fast" for 15 minutes. Let simple syrup cool to room temperature. Add to alcohol. Let stand at room temp overnight, strain and chill. Place in bottle with a air tight stopper. You could use Vodka instead os Everclear but use 80 proof, also suggested to increase lemons to 15 for more lemon flavor. If you can find it organic Lemons are best.