Today, November 14, 2013, is National Guacamole Day. Guacamol is an avocado-based sauce. In addition to its use in modern Mexican food, it has become part of American food as a dip, condiment, and salad ingredient. It is traditionally made by mashing ripe avocados with a molcajete (mortar and pestle) with sea salt. Some recipes call for tomato, onion, garlic, lemon juice, chili, yogurt and/or additional seasonings. Guacamole was made by the Aztecs by at least the 16th century.