Watermelon Lime Frosty
3 cups watermelon, cubed and frozen
1 ripe banana, peeled and frozen
2 tablespoons agave nectar or maple syrup
Zest from 2 limes
Juice from 2 limes (about 4 tablespoons)
1/2 cup water
Blend all ingredients until smooth, adding more water as needed to keep the mixture moving.