No more rotten and black bananas after a few days: with this method they last for 2 years.

After putting all the ingredients in the jars, we need to sterilize them.  First we need a pot of hot water and put a piece of cloth  inside to prevent the jars from bursting when pushed in. Once we have placed all the containers in the pot and simply placed the respective lids on them, all we have to do is heat the whole thing and let it sterilize for about ten minutes.

After the required time, all we have to do is dry the jars, seal them  hermetically  so that no air gets in and store them in a  cool  place for two years.