Lucille Harling wrote: My question is: how do I ferment already pickled sushi ginger? Here is my method thus far: I bought a jar of already pickled sushi ginger.
Why you wish to ferment your sushi ginger?
The ginger is already pickled in vinegar and washing it may increase the chance of introducing bacteria to the kombucha liquid.
If you want to make lacto fermented ginger, it might be preferable to start with fresh finely sliced ginger and ferment it from scratch in brine.
When I make sauerkraut I add slices of fresh garlic and finely julienned ginger between layers of cabbage. If you have a batch of sauerkraut going, you could bury a layer of finely sliced ginger to your sauerkraut.
Lacto fermented daikon radishes are really tasty as are cucumbers - I usually sprinkle salt over the vegetables to draw out excess liquid and sliced ginger could be added to the brine for a natural ferment.