Ensure to chill your Martini glass prior, pop it in the fridge with a few ice cubes whilst you assemble.
Add a generous amount of solid ice to your cocktail shaker (ice that is not solid will melt too quickly and ruin the taste).
Add vermouth, Blue Turtle, lime juice, and pineapple juice to shaker.
Cap and shake vigorously to chill the Martini and create foam. Strain into chilled Martini glass. Garnish with lime wheel or pineapple.