In a small saucepan simmer the apple juice with the cinnamon sticks and star anise. When it barely comes to a boil, remove from heat and let steep for 30 minutes, then chill for a couple of hours (or overnight).
When your'e ready to start making cocktails, remove the cinnamon sticks and star anise and set aside for garnish.
In a cocktail shaker, shake the spiced apple juice, vodka, lemon, and ice together (work in batches if you need to).
Pour into glasses, add a splash of sparking water, and garnish with apple slices, cinnamon sticks and star anise pods.
Recipe by Love and Lemons at https://www.loveandlemons.com/apple-spice-cocktails/