Grown-Up Frozen Lemonade

Try using other citrus fruits in this recipe, such as fresh lime zest and juice, or even lime-or citrus-flavored vodka. (You may need a little more sugar, because it's not naturally as sweet as limoncello liqueur.)
Combine the sugar and 1/2 cup water in a small saucepan and cook over medium heat, stirring frequently, for 3 minutes or until the sugar is dissolved. Remove the pan from the heat; add the lemon zest. Allow to cool to room temperature for about 30 minutes.Strain the mixture through a fine sieve into a blender, squeezing out the solids with a wooden spoon to extract the liquid. Avoid dry substances.If desired, add the ice cubes, lemon juice, and limoncello to a blender and blend until smooth. Decorate if desired. Serve immediately.