Freezing a banana might just be common sense to some of you, but it wasn’t
that way for me at first. So I’ll briefly share what I’ve learned.
First of all, bananas are best to freeze when they are speckled, which is when
their fructose level is high. Simply peel the bananas and stick them in a plastic
storage bag. I used to put the whole banana (with peel) in the freezer and
quickly realized that they are impossible to peel!!!
Source: WFM Blog – 2