Watermelon Lemonade Recipe

Cut the watermelon into 2-inch cubes. Place the cubes in a colander set inside a bowl and sprinkle with the sugar. Stir the watermelon for a minute to extract the juice. You will get anywhere from 1 to 3 cups of juice, depending on ripeness. Pour the rum, blackberry liqueur, lemon juice, and watermelon juice in a large pitcher. Add 1 cup of the syrup and stir well. Taste the lemonade and add more syrup or water to taste. Pour over ice in an iced tea or cooler glass, garnish with a few blackberries and a mint leaf, and serve.