Combine the raspberries, basil, lemons and simple syrup in a small pitcher and muddle until the raspberries are mashed. Add the Limoncello and vodka. Let chill in the refrigerator for 30 minutes to allow the flavors to meld.
Put crushed ice into rocks glasses and add some of the raspberry mixture. Fill to the top with sparkling wine. Garnish with lemon and raspberries and basil sprigs if desired.