Pour all the alcohol in a large sealable jar.
Wash the lemons and with a very sharp knife cut the zest very finely without removing any of the white part of the skin.
Place the zest in the jar with the alcohol. Repeat the process for all the lemons.
Store the jar in a dark place for 20 days.
After the 20 days, put the cream and the milk in a pot. Add the vanilla bean, do not split it, and the sugar. Bring the content to a boil so that the sugar completely melts. Remove the vanilla bean.
Once the cream/milk has cooled, pass it through cheesecloth to remove all residues. Add the alcohol after you pass it through cheesecloth as well. Mix well.
Put content in bottles and store them in the freezer to cure. After two weeks you can start enjoing the Crema di Limoni.
Shake well before serving and serve ice cold.
Every few days shake the bottles well to prevent separation.
PS: Bottles stored in the freezer will last up to one year.
PS: This recipe will produce about 3 - 750 ml bottles.