Limoncello is a typical liqueur from Southern Italy- the centers of Limoncello production are centered around the Gulf of Naples and the Gulf of Salerno. Best served chilled, limoncello is a perfect after-dinner digestivo- though I would never criticize anyone for drinking it before, or during dinner, or on a lazy summer afternoon, or to chase away a winter chill, or... sorry, I was distracted by the prospect of a nice, chilled glass of limoncello.
While limoncello recipes are plentiful on the internet, here's my personal method for making it. First, thorougly wash, then peel fifteen or sixteen lemons (depending on the size of the lemons, and whether the market is selling them in lots of three or lots of four) with a vegetable peeler, making sure you are not getting any of the white pith (which will make your limoncello bitter). Place the lemon peels in a clean gallon jar and pour a gallon of pure grain alcohol (I have to drive to Connecticut to obtain the stuff) over the lemon peels, and cover. Let the mixture sit for at least a week (I leave the jar in a dark, cool corner for three weeks), then prepare a simple syrup by heating two pounds of sugar with a quart of water, and simmering until the mixture is slightly thickened. Strain the lemon peels out of the alcohol, and add the syrup to the infused alcohol (I use a couple of one-gallon pitchers for this stage of the production). Dilute the resultant syrup/alcohol mixture with water until the desired strength is reached (I use a 50/50 ratio, making the resultant liqueur about as strong as a typical vodka). Strain again, and bottle the stuff. Keep away from small children and open flames. A few hours before serving, place the bottle in the freezer to chill. If necessary, dilute individual servings to taste... the stuff is strong.
Here's a still life which incorporates the ingredients of this delicious treat. Look at that forlorn lemon, which has been robbed of its golden integument. Also, note that the contents of the gallon jar, with an alcohol content around 95%, have a clear golden color, while the glass of limoncello in the center has a milky translucency. This is the same effect one sees when one mixes water with absinthe- as the percentage of alcohol decreases, the oil from the lemon peels forms a microemulsion in the glass:
La dolce vita, served by the glass.