1½ cups good vodka, such as Grey Goose
1 cup freshly squeezed lemon juice (6 lemons)
6 tablespoons sugar syrup (see note)
¼ cup Italian Limoncello liqueur
1½ cups cold club soda, such as Pelligrino
Sliced lemon, for serving
Combine the vodka, lemon juice, sugar syrup, and Limoncello in a large pitcher. Just before serving, pour in the club soda and stir. Fill highball glasses with ice and pour the mixture over the ice. Garnish each drink with a slice of lemon and serve cold.
Makes 4-6 drinks