Chop your tomatoes into small pieces, roughly 1cm cubes. Chop all the other ingredients and here's the spot you can add chill or lime if you like. Pop it all in your jar.
Using a spoon go ahead and stir the salsa and slightly push down on it so the juices come out. I add the whey at this time so it's easier to push down.
Make sure all the salsa is under the whey, if not, add some water/ weight it down with a smaller jar. Pop the lid on tight and leave to ferment for 1-3 days. It's done when you notice bubbles moving around when you look at the side of it and often there's a clear liquid at the bottom and the tomato mixture has risen up the jar.
It's great on toast, in tacos and with avocado for a yummy dip.
This lasts me 3+ weeks in the fridge and I adore that the taste gets even zingier and yummy the longer it sits.