Chop the tomato into small chunks and place into a large bowl.
Finely chop the red onion. Crush the garlic. De-seed and finely chop the chillies (again, optional depending how much heat you like). Then chop roughly the coriander and add all three to the tomato.
Cut the avocados in half and remove the stones and spoon out the fruit from the skins. Add these to the bowl and squeeze the lemon and line juice of the lot!
Now just mash the lot together. I tend to start with a fork and mash the avocado and then finish off with a whisk to make sure it's all mixed together thoroughly.
Then pour in to a fresh bowl and service with tortillas or any Mexican dish. Try my favourite chicken and aubergine fajitas. They're fantastic and you can find them here.