Looking to make a Koji hot sauce
I'm wanting to make my first hot sauce with Koji and would love a little input from the knowledgeable folks here. I'm fairly experienced with lacto-ferments, and with the speed that Koji interacts with peppers it seems like that will be happening regardless, and then there's going to be a several-month secondary fermentation where the koji enzymes act on the peppers. So my main questions:
- Pepper mash (aka, blender first, for more surface area)? Or should I just cut the peppers in half?
- Rice koji or barley? I love the idea of the additional umami from the protein in barley, but peppers contain almost no protein so I feel the additional protease from barley koji would be wasted. Might be better off going with rice so the enzymes have more substrate to interact with?
- How much koji? Assuming the sauce is almost entirely peppers (I will add some garlic and onion also, but that will be ~10%), is the Koji added 1:1 vs pepper weight or like 5%? I'm unfamiliar with how strong the enzymes are and how much flavor it will contribute.
- Do you brine this the same way as a traditional hot sauce ferment? 2.5-3.5% salt vs total weight of peppers, koji, water?