1. To make the syrup, fill a small pot with water. Bring to medium and slowly add sugar, cloves, vanilla bean, cinnamon sticks and orange rind. Once sugar has dissolved, remove from heat and let steep for 15 minutes, until it is a golden orange color.
2. Strain through a fine mesh sieve to remove cloves and orange rind. Store in an airtight container in the fridge.
3. To make cocktails, divide prosecco into 2 champagne flutes. Split apple brandy and lemon juice between flutes, then add 1/2 fluid ounce simple syrup into each flute. Stir with a long spoon, then serve with orange or lemon rind twist.
Store syrup in the refrigerator for up to 6 months. To make a large, party-size serving, combine appropriate amount of simple syrup with corresponding amounts of prosecco, apple brandy, lemon juice and orange or lemon rinds (1 fluid ounce simple syrup for every 2 servings). Stir until well combined, then pour into individual flutes.