What is this? I've never heard of blueberry vinegar before.
I looked up a recipe and it sounds like just adding blueberry flavor to existing vinegar.
https://blueberry.org/recipes/blueberry-vinegar/
But you're talking about fermenting blueberries, which sounds way more advanced, and more desirable. Where can I find out more about this?
We have elderberries ripening and elderberry vinegar sounds intreguing!
