Cut the avocados in 1/2, remove the pits, and scoop out avocado flesh into a molcajete or bowl. Add garlic and salt & pepper to taste and and mix/mash until the avocados are creamy. Then, fold in the tomato, jalapeño, & onion. Sprinkle with lime juice and cilantro. Mix well and taste for salt and pepper. Serve with tortilla chips.
May add additional options to add some flare to your guacamole.