Prepare the ginger: Peel and finely grate about 1 inch of fresh ginger root.
Muddle the flavors: In a cocktail shaker, gently muddle the grated ginger with mint leaves to release their oils and flavors.
Add wet ingredients: Pour in the coconut water, cream of coconut, lime juice, and simple syrup.
Shake well: Add ice to the shaker and shake vigorously for 15-20 seconds until well chilled.
Strain and serve: Strain the mixture into ice-filled highball glasses, filling about ¾ full.
Finish the drink: Top with a splash of soda water for some fizz. Stir gently to combine.
Garnish: Add a lime wheel, mint sprig, and a sprinkle of toasted coconut flakes.