1. Dice the onion and garlic cloves finely, chop the cilantro (or parsley) and add all together with some salt to a mortar and crush until you get a nice paste – some larger pieces are ok. Set aside.

2. Wash the tomato, halve it and remove the watery insides – cut into dices. Remove the stone from the avocado and add the insides of the avocado to a bowl and mash it with a fork until smooth. Add the onion/garlic paste, diced tomato and chili pepper (optional) to the bowl and mix. Add the lime juice and season with salt and pepper. Serve immediately with some tortilla chips.