Dice cilantro, tomato, onion, and pepper and add to a mixing bowl.
Mince garlic with microplane and add to bowl.
Quarter avocados, removing pits and skins, and add to bowl.
Add lime juice and pickle brine.
If using, split passion fruit open and scoop pulp and seeds into the bowl.
Mash avocado with fork and mix all ingredients together.
If using, fold pomegranate seeds into mixture, being careful not to burst them.
Season with salt and pepper to taste.