Freezing bananas. I peeled the banana, sliced it onto a pan, brushed each piece with lime juice (was then out of lemon), froze the pieces and dumped them into serving size baggies. They defrosted with a semi-mush, non-solid texture.
I just cut them in half, put 2 halves in baggies, and freeze.
But I don’t expect them to be like fresh bananas when they come out. We only use them frozen, cut into chunks, in the blender for smoothies; or mashed into banana bread.