1
Select and pre-chill an OLD-FASHIONED GLASS.
2
Prepare garnish of basil sprig.
3
MUDDLE basil sprigs (no need to pluck leaves from stem) in base of shaker.
4
Add next 7 ingredients (all but sparkling wine) and SHAKE with ice.
5
FINE STRAIN into ice-filled glass.
6
TOP with prosecco.
7
Garnish with basil sprig bouquet.