Peel the skins and remove the seeds of all 3 whole avocados and mash them in a large bowl.
Prepare the 2 cups of tomatoes, 1/2 cup of white onion, 1 tbsp of garlic, 1 tbsp of serrano pepper, and 3 tbsp of cilantro by cutting them to their respective sizes.
Add all ingredients to the large bowl, including the juice of 1 whole lime and 1/4 tsp of sea salt. Then mix all ingredients and enjoy!