Prep Glass: Fill your rocks glass with ice cubes. Give it a quick stir to chill the glass and set it aside.
Add Spices: In the shaker, mix together 1 pinch of allspice, 1 teaspoon of fresh grated ginger and 1 pinch of freshly grated nutmeg.
Add Juices: Next, measure and pour ½ oz cranberry juice and ½ oz tart cherry juice.
Add Rum: If using, add 1 oz Light Rum to the mix.
Add Sugar: Finally, add ¼ oz rich simple syrup into the shaker.
Shake: Fill your shaker with ice and shake vigorously for about 10-15 seconds.
Strain: Discard the ice in the Old Fashioned glass and refill it with fresh, new ice cubes (you can also use the cocktail strainer to remove the excess water that has formed at the bottom of the glass and add a few more ice cubes if necessary). Then, use both the cocktail strainer and the fine strainer to strain the drink into the ice-filled glass.
Top with Ginger Ale: Top up with approx. 2 oz ginger ale (adjust to taste and to the size of the glass) and stir gently to combine.
Garnish: Sprinkle a pinch of ground ginger on top for garnish & for an added touch of spice and serve immediately.