We know this through Japanese connections, so it may have another name to you. It's yog that generates at room-temperature, no cooking required. And it's perpetual in that it only requires a spoonful of the previous batch to start the next. Ours died in the care of some well-meaning but slightly daft friends and we can't find our original, years-old source.
Does anyone have a spoonful of starter to spare? I have seen some kits on-line, but I thought it would be more fun to connect with a Chowhound and add to the diaspora of their strain.
We are near Main/12 but have spoon; will travel.