Wash and dry the tomato, remove the stem and dice finely. Wash the lime in hot water, dry and grate the rind and squeeze out the juice. Peel finely chop the garlic and squash into a paste using the back of the knife. Wash and shake dry the coriander then remove the inedible parts of the stem. 

Cut the avocado in half, remove the stone, scoop out the flesh using a spoon and dice into chunks. Then mash in a bowl using a fork.

Cut the chili pepper into fine strips. Mix all ingredients together using the fork, add oil and season with salt and pepper.