01 - Cut avocados in half lengthwise, remove pits, and scoop flesh into a medium mixing bowl.
02 - Mash avocado with a fork until reaching desired consistency, whether chunky or smooth.
03 - Add diced red onion, tomato, jalapeño if using, cilantro, lime juice, salt, black pepper, and minced garlic to the mashed avocado.
04 - Gently fold ingredients together until evenly combined. Taste and adjust seasoning with additional salt or lime juice as needed.
05 - Transfer guacamole to a serving bowl.
06 - Present immediately with tortilla chips.