Mellow Mary

Ingredients
1/2 cup dark rum
2 cups diced watermelon
1/4 cup sugar
1/4 cup water
2-3 tbsp lemon juice
1 rosemary sprig
Splash of club soda

Preparation
In a small saucepan over medium heat, combine sugar, water and rosemary to make syrup. Boil until sugar dissolves. Turn off heat and steep for 15 minutes. Puree syrup, lemon juice, rum and watermelon in a blender. Pour into a glass and top with club soda.