I just started back to the gym after having my second child two months ago and was experimenting to find a smoothie high in protein and low in sugar to augment my workouts. I have this almost daily! It tastes like a decadent milk shake, and yet it is actually good for you. The real trick is to use previously sliced and frozen bananas. I buy bananas by the armload and then when they start to get riper than what I would want for eating, I peel and slice and put in Ziploc freezer bags. Then they can be used in almost any recipe asking for fresh ripe bananas.