Don’t be put off by the intricate instructions here, a balsamic vinegar reduction is one of the simplest things you can make, it keeps forever, is low cal, and you can use it so many ways if you tried to list them all you’d fill up a page. It will be your new best friend, I promise, but there are a few things you need to get right to make it work, so read through the instructions and then fire up your stove.