fizzy drink

[Bobbie]

I had some almond milk in a bottle in the fridge and it went off - I thought I would have to throw it out, but when I taste it, it tasted ok and was slightly fizzy. So I blended it with lemon juice and honey, and it made a nice drink that pleased sad-eaters.
I suppose rejuvelac would do the same job but I haven't managed to make it yet.