Cut the avocados in half lengthwise. Drive chef's knife into large pit and twist to remove. Scoop the avocado out from the skin into a bowl.
Mash the avocado with a fork, add in onion and cilantro, oregano and basil..
Mix to incorporate.
Season to taste with salt, pepper and lime juice.
Serve immediately or chill. If you are not going to eat the guacamole immediately, store in refrigerator with plastic film wrap pressed onto the guacamole.