If the red onion is small, you can use the whole one or replace it with white onion for a softer onion taste. If you do not like too spicy taste, then replace the chili pepper with bell pepper or any other non-hot variety. Lemon can be replaced by lime. Let’s cut the avocado in half, remove the stone, and separate the flesh from the peel. Immediately squeeze the juice of half the lemon onto the avocado.