Watermelon Lime Sorbet (must try with all the baby watermelons from CSA) Note: just made this and it was sooo good and refreshing. I didn't make it in an ice cream maker either--just froze the watermelon beforehand and mixed it up in the Ninja.
Turn anything into an ice cream or sorbet if you use the 3 cups frozen to 1 cup not frozen guideline. I've made watermelon sorbet, cantaloupe sorbet, and carrot juice sorbet - each with only one ingredient per recipe. Just combine the frozen with the unfrozen!