large Hass avocados (about 9 oz/250 grams each) • medium tomato (less than 3.5 oz/100 grams), not too ripe • medium scallion (less than 3.5 oz/100 grams) • from 1 sprig of cilantro (10-15 leaves), finely chopped • Juice of 1 lime • extra virgin olive oil (about 3.4 fl oz/100 ml) • Salt and chili to taste (traditionally jalapeño) • garlic cloves