Blend all the ingredients besides the olive oil in a food processor.
With the motor running, gradually add the oil in a thin, steady stream until well combined and a smooth paste forms. Add a bit of water to the mixture if it seems a bit too thick. You may not need all the water.
Check the seasoning and add more if needed.
Transfer to an airtight container and pour over a little extra oil to cover the pesto surface.
Recipe by SAPeople South African Recipes at https://tastyrecipes.staging.sapeople.com/chilli-and-lime-coriander-pesto/