5 cups cubed seeded watermelon
1 cup sparkling water, chilled
3/4 cup white rum
1/4 cup chopped fresh mint
1 (6-ounce) can frozen limeade concentrate, undiluted
Mint sprigs (optional)
Lime slices (optional)
Arrange watermelon in a single layer on a baking sheet , freeze 2 hours or until completely frozen.
Combine frozen watermelon, sparkling water, rum, mint, and limeade in a blender ,process until smooth. Garnish with mint sprigs and lime slices, if desired. Serve immediately.