In a medium saucepan, bring 2 inches of water to a boil. Place beets into a steamer basket and put over the boiling water, cover and steam for 7 minutes or until tender with a fork.
If using frozen cherries (fresh cherries can be added during blending) add them on top of the beets, cover and steam for another 3 minutes. Let cool slightly. Reserver steamer water.
Place the beets, cherries, bananas and lemon juice into a blender or food processor and puree for 1-2 minutes on high or until completely smooth. You may need to add in some additional reserved water to thin it out, if so start by adding in 1 tablespoon of water in at a time or until you reach your desired consistency. I did not add any additional water to my puree.