Place 4 green basil leaves into a shaker
Pour in 0.75 oz of lemon juice, 0.35 oz of verbena liqueur, 1.5 oz of genever and 0.5 oz of passionfruit genever
Fill the shaker with ice cubes and shake
Finely strain into a chilled cocktail glass
Garnish with a green basil leaf, violet flowers and a pinch of caster sugar