The cocktail is adapted after a recipe from the Pizzicato Restaurannt in Philadelphia. This is a variation of the, well known, Mojito, but the difference her is that the base spirit is limoncello, and more specifically , the Villa Massa limoncello.
Unfortunately I didn't have Villa Massa Limoncello and I used Pallini Limoncello, a more sweeter version, so I had to cut a little from the amount of sugar used in the cocktail.
In any case, the cocktail is delightful
2 1/2 ounce Villa Massa Limoncello
1 to 2 teaspoon of sugar
15 to 20 fresh mint leaves
4 lemon wedges
club soda