Pour in the limoncello and lime juice. Give it a quick stir.
Fill up the glass with Prosecco.
Finish it off with a splash of sparkling water.
Garnish with lemon slices and a mint sprig.
Notes
Always store your bottle of Limoncello in the freezer.
Place your wine glasses in the freezer for 30 minutes before serving, too.
Mix your Limoncello Spritz in a large jug if you're hosting a party. You'll need 8 fluid ounces (240 ml) of Limoncello for a bottle of Prosecco. Serve it up quickly to prevent the Prosecco from going flat.