- 1/2 cup sugar
- 1/2 cup water
- 4 cups cubed seedless watermelon
- 2 tablespoons lemon juice
- 1 bottle sparkling water
- 4 ounces citrus vodka, optional
In a small saucepan combine the sugar with 1/2 cup water. Bring to a boil over medium heat, then remove from the heat and let cool.
Fill a pitcher with ice, add the watermelon mixture and stir until chilled. Pour into chilled martini glasses and top with seltzer. Add vodka, if desired.