What you'll need:
-An ice cream maker. Our ice cream machine is the Cuisinart Ice Cream and Sorbet Maker.
-1 (2-pound) piece of seedless watermelon, rind removed ad flesh cut into 1-inch pieces to yield about 3 1/2 cups 1 (6 ounce) can of pineapple juice, chilled
-3/4 cup canned ginger ale, chilled
-1/3 cup fresh lime juice, about 3 large limes
-1/3 cup grenadine (I recommend Rose's)
I recommend that all of the ingredients are chilled before you use them.
In a blender, blend the watermelon, pineapple juice, ginger ale, lime juice, and grenadine until smooth. Pour into your ice cream maker and turn on your machine for about 35 minutes. If you have never used an ice cream maker before, be sure to follow the instructions on how to prep your machine before use (freezing the inner core).