Place the vodka, passion fruit liqueur, lime juice and vanilla syrup in a shaker half filled with ice cubes. Cut the vanilla pod in half lengthways, remove the seeds with the flat of a knife and add to the contents of the shaker. Halve 3 passion fruits and add the flesh to the shaker. Shake vigorously until the shaker feels cold. Strain into two martini glasses and place half a passion fruit, sprinkled with vanilla sugar, in the glass. Serve with a teaspoon and the champagne shooter....