Yup. Very simple:
A handful of baby spinach
A handful or two of chard
A mango (without skin/seed)
An apple (whole, seeds and all)
A banana (without peel)
8-10 strawberries (including top)
2-3 cups of water, depending on how liquidy you want it.
I've used frozen for some fruit when not in season. Blend the crap out of it (this is where spending on a decent blender can go a long way -- we got a Vitamix Blender for this and it's worth every penny).
Enjoy.
