1. step: buy bananas
2. step: peel bananas
3. step: cut bananas at least in half
4. step: put the cut bananas in bags
5. step: put the bags with bananas in the freeser
I chop mine like rockrose, leave them on parchment paper on baking tray, put in freezer for about half an hour and then when they've frozen I place them in ziploc bag, easy to just grab a handful when I want them, I freeze rhubarb the same if there is a glut of them, saves dumping them, and they do make for gorgeous ice cream
Years ago when going to Weightwatchers, a summer time tip was to freeze bananas and then you could eat them like an icelolly. Because they were so hard, it took ages to eat them and you didn't feel left out when others were enjoying ice cream etc.