Make the base of the guacamole: Use a spoon to scoop out the flesh of each avocado into a medium-sized mixing bowl. Sprinkle ½ teaspoon of salt and squeeze the juice from half of a lime over top. Then use a potato masher or a fork and mash all the ingredients until the avocados form a chunky consistency.
Mix in the remaining ingredients: Add the onion, pepper, tomato, and cilantro in the same mixing bowl. Then use a spoon to gently fold all of these ingredients together until incorporated.
Adjust for taste: Let the guacamole sit for a couple of minutes then taste it. Feel free to add more salt, lime juice, or other ingredients depending on your personal preference.
Serve the guacamole with some tortilla chips and enjoy!