1. Cut avocados in half. Scoop pulp into a bowl, and mash with a potato masher or fork until slightly chunky. Stir in chopped red onion and next 4 ingredients. Cover with plastic wrap, allowing wrap to touch mixture, and let stand at room temperature 30 minutes. Serve guacamole with tortilla chips.
Cilantro Guacamole: Mash avocado, and stir in ingredients as directed. Stir in 3 Tbsp. chopped fresh cilantro and an additional 1 Tbsp. lime juice. Cover mixture, and let stand at room temperature 30 minutes.