Green apples and lemon juice give this martini a jolt of flavor.
Bring sugar, 1 cup water, and 3/4 of the apple peel to a boil in a medium saucepan over medium-high heat. (Reserve the remaining apple peel for garnish.) Cook, stirring occasionally, until sugar has dissolved, about 5 minutes. Transfer syrup to a medium bowl set over an ice bath; let stand, stirring occasionally, until cool. Pour through a fine sieve into another bowl; discard solids.
Cut apple into chunks; press through an electric juicer into a small bowl. Pour through a fine sieve into another bowl; discard any solids, and set juice aside
Cut remaining peel into thin, 4-inch-long strips. Tie each strip into a knot; set aside in a bowl of water with lemon juice.
Fill a cocktail shaker with ice. Add vodka, 2 ounces syrup, and 1/3 cup apple juice; shake. Divide between 2 martini glasses; garnish with apple knots.
If you don't have a juicer, you can substitute 1/3 cup store-bought unsweetened apple juice for the fresh apple juice in step 2. Repeat this recipe in batches, as needed.
This recipe was also featured on "Mad Hungry with Lucinda Scala Quinn."