This is called lacto-fermentation and you mix it with salt with a proportion of 2.5-3.5% of the weight of the ingredients to start the fermentation process.
In my language (german) it means "powder from milled chili peppers". In this case I mean the fruits from "chili pepper"-plants ;-)
Chili peppers (unknown variety) Apples Peaches Blueberries Onions Garlic Tomatoes
I will open the bag next weekend and I hope everything went well ;-)