Cut the avocado in half, taking care with your knife to work around the stone. DO NOT attempt to cut through the stone! Remove and discard the stone and remove the acovado flesh from the outer skin. Place the avocado flesh in a bowl and mash down with a fork to the preferred consistency.
Add the remaining ingredients, mix well to combine and place into your serving bowl. Cover with clingfilm and refridgerate until you are ready to serve. Guacamole is best served freshly made as the guacamole will discolour.
If you are making this guacamole to serve to children, you may prefer to omit the red chilli. In this instance, place a bottle of Tabasco next to the guacamole and those requiring some heat can spice up their own dish.