One way to reduce the amount of food waste we create on a daily basis is to repurpose food scraps. There are many ways to repurpose food scraps, including dehydration, making sauces and spreads, pickling, jarring, creating soup stocks, and fermentation. Fermentation is especially helpful because it produces bacteria, yeasts, and other microorganisms that break down, acidify, and preserve every part of our foods- including things like stalks, peels, and other scraps that are normally thrown away. For example, this author suggests that any readers with hot peppers and any other fruits or veggies, like peaches, that are about to expire, ferment the fruits or veggies until everything is soft and then puree them into a hot sauce that will keep in a cabinet for months on end. Opting to ferment fruits or veggies that are on the brink of going bad allows us to minimize our food waste by allowing ingredients to be edible for longer, and helps us save money on things we may have purchased later on at the grocery store like hot sauce or pickles.

https://www.salon.com/2022/08/29/building-bold-flavors-and-reducing-waste-with-fermentation_partner/