Oops - forgot to post the recipe. I could type one out for you, but the best description of the whole process is the Recipe at Limoncelloquest- it has the whys and wherefores and should satisfy even the most inquiring mind. The person who wrote it seems just the sort of person you'd like in the kitchen with you when you're making your first batch, and sitting next to you in a lawn chair when you take your first sip. Check it out.
p.s. be forewarned about making Limoncello - patience required. A friend once bought me a poster "God grant me patience, and I want it right now." That's me! we'll see how I do with the waiting and the filtering.