Place the onions in the food processor and pulse until onions are a fine mince.
Add the carrots and pulse until fully combined with onions.
Place all other ingredients in the processor and blend until it is fine (or coarse depending on your preference).
Get a clean and sterilised mason jar and put mixture in.
Use a spoon or potato masher to level the mixture up - you want a even, tightly packed jar of chutney.
Leave it at room temperature for 3 days (this is the important part) then transfer to the fridge.
Notes
If you don't have any whey, you could try using a few tbspns of organic probiotic yogurt instead, or emptying out a probiotic supplement (out of its capsule) into the mixture. I have never done it but in theory it should work, let me know if you try it.Adapted from From Nourishing Traditions by Sally Fallon