Combine vodka, passionfruit liqueur, passionfruit purée, lime juice, and simple syrup in a shaker. Add ice and shake until chilled. Strain into a coupe glass and garnish with half a passionfruit. Serve with the sparkling wine as a sidecar in a separate glass.
1.5 oz vanilla vodka
1/2 oz passionfruit liqueur
1 oz passionfruit purée
1/2 oz lime juice
1/2 oz vanilla simple syrup