Well, it doesn’t necessarily have to be simplified all the way down to zero preparation. What if you premixed two containers, one frozen and the other refrigerated, so that only one mixing and one blending step had to be done in the morning? For maximum simplicity, one of those containers could be a piece of the blender itself.
I’m pretty sure that a puree of ice and frozen banana (or whatever) would freeze solid in the freezer overnight, and not be amenable to blending in the morning with the other ingredients. (Also, I use a stick blender.)
Well, it doesn’t necessarily have to be simplified all the way down to zero preparation. What if you premixed two containers, one frozen and the other refrigerated, so that only one mixing and one blending step had to be done in the morning? For maximum simplicity, one of those containers could be a piece of the blender itself.
I’m pretty sure that a puree of ice and frozen banana (or whatever) would freeze solid in the freezer overnight, and not be amenable to blending in the morning with the other ingredients. (Also, I use a stick blender.)