If you’re not already pickling your own sauerkraut in huge jars on the windowsill, or shredding radishes, chilli and cabbage for homemade spicy kimchi, it’s only a matter of time.

[Read more: What is kombucha and what are its health benefits?]

The craze for fermentation is in full, flavoursome swing, so why not get involved by making Ukrainian chef Olia Hercules’ easy fermented green tomatoes, from her new book Kaukasis

Just follow these simple steps…