In a small bowl, combine the cinnamon and sugar. Pour onto a small plate and spread into an even layer at least as wide as the opening of your glass.
Cut a slit in one of the apple pieces and run the fruit around the rim or two rocks glasses. Dip the rim of the glass into the cinnamon sugar mixture.
Carefully fill the glass with ice (don't knock off the rim!) and set aside.
In the bottom of a cocktail shaker muddle together the apple and ginger.
Fill the shaker with ice, and add in the vodka, orange liqueur, lime juice, orange juice, simple syrup, and water.
Shake well until chilled.
Strain the cocktail into your prepared glasses. Garnish with an apple slice or cinnamon stick.
Make it for a crowd: In a pitcher muddle together 1 whole Gala apple cut into pieces + 8 thin slices (2 tablespoons) ginger that's been peeled and thinly sliced. Pour in 1 1/2 cups vodka, 1/2 cup orange liqueur, the juice of 3 to 4 limes, 2 cups orange juice, 1/2 cup water, and 1 cup simple syrup. Stir to combine. Garnish glass as directed & serve. *Do not add ice to the pitcher, it'll water down the cocktail!