For a more tart bite, add an extra teaspoon of lemon juice to brighten up the flavor.To make it boozier, try adding 2 ounces of bourbon, apple vodka, or lemon-flavored vodka. Hard apple cider is also a great alternative.Want more spice? Stir in a star anise or sprinkle a little nutmeg for a warm, earthy touch.Regular cubed ice works well, but for a fun twist, use frozen grapes or make prosecco ice cubes.To get an apple slice to curve nicely in the glass without breaking, slice it as thinly as possible. Add a bit of ice first, tuck in the apple, then fill the rest of the glass with ice to hold it in place.