I'm not sure this even qualifies to be an ice cream since it lacks dairy as a main ingredient. This is something else to do with the watermelon that is ultra-low in calories and high in awesome. I could easily polish off a watermelon by myself. Watermelon granita is how I enjoyed it last year. This summer, I think I can start to experiment a little more.
Makes: 1 quart
4 c seedless watermelon, cubed
1 can full-fat coconut milk (at least 70%), shaken, not stirred
1/4 c raw honey
juice of 1 lemon
Blend everything together in a food processor. Pour into a 9" x 13" baking dish. Place in freezer until set. Scrape everything out and place frozen bits into the food processor. Purée until smooth. Scoop into a freezer-safe container and chill until set, about 3-4 hours.