Originally Kachumbari is just a tomato and onion salad but we can go wild and add more stuff to it. Avocado goes well with lime and cilantro while pepper parsley and lemon are lovely choices too, others really dig cucumber and garlic.
Rinse and peel that needs to be rinsed and peeled. Dice the the ingredients up. Try to make similar sized rectangles. Similar size food not just looks but tastes better too.
Sprinkle salt and lemon or lime juice on top then mix everything together. Keep it in the fridge until it is served.