For the sugar rim: In a small bowl, combine the sugar, salt and orange, lime and lemon zests. Pour onto a rimmed plate. Use the cut side of a lime half to wet the rim of 2 chilled martini glasses. Dip the rim of the glasses into the sugar mixture to coat.
For the martini: Add 1 cup of ice to a cocktail shaker. Add the vodka, limoncello, orange liqueur, lime juice and orange juice. Put on the lid and shake vigorously. Strain into the martini glasses and serve.
Recipe courtesy of Valerie Bertinelli