Halve lemongrass and gently smash its roots ends with the blade of the knife to release essential oils. Transfer lemongrass into a bottle of rum, then seal and let rest for approx. 24 hrs.
Add lemongrass rum, cloudy apple juice, ground cinnamon, and honey to a cocktail glass and stir to combine.
Add ice to a glass and fill up with spicy ginger soda. Garnish the drink with half of a lemongrass stalk and a cinnamon stick. Enjoy!