8 cups watermelon chunks
4-5 fresh mint leaves
juice of 2 limes
zest of one lime
Put everything in a blender and puree. You may need to do the watermelon in batches, or puree some, add more watermelon chunks, puree more.
Pour into a freezer safe covered container. Freeze overnight.
Before serving, let it thaw a bit on the counter to soften.
Garnish with mint