Add onion, tomato & chillies to a bowl and mix together.
Now remove the stalks from your coriander.
Roughly chop the leaves and add them to your bowl.
Cut your avocados in half, lengthways and remove the stone.
Keep one stone & discard the other.
Scoop out the flesh and add to a small bowl.
Quickly mash the flesh, leaving some chunks if you like.
Now add the lemon juice and mix.
Add the your avocado mash to the chopped salad and mix it all together.
Do a taste test and add salt to season.
Feel free to add more fresh chilli if needed.
Place the stone in the centre of the guacamole, cover with film and refrigerate until you're ready to serve.