Directions

1. Preheat the broiler.
2. Remove some of the grapefruit peel for a twist garnish, then cut the grapefruit in half. Place the grapefruit halves on a baking sheet flesh-side up and sprinkle sugar evenly over the tops. Place under the broiler until the sugar is caramelized, about 6 minutes.
3. Fill a highball glass with ice and add the vodka. Remove the toasty grapefruit and squeeze the juice into the glass. Top with ginger ale and garnish with a grapefruit twist.