Grapefruit Basil Martini

Ingredients
1 3/4 oz gin
1 oz light agave nectar
1 oz grapefruit juice
2 basil leaves
Splash of sparkling wine
Grapefruit slice for garnish

Preparation
Muddle basil and agave nectar in a cocktail shaker. Add remaining ingredients and ice and shake well. Strain mixture into a glass and top with sparkling wine. Garnish with grapefruit slice.