Add the onion, jalapeno, and garlic to a resealable bag. Season with a pinch of kosher salt. Seal the bag, pressing out as much air as possible so the bag doesn’t pop. Using a rolling pin or heavy-bottomed pan, carefully smash down on the bag to release the natural juices of the vegetables. The aromatics should be juicy and softened, but not smashed into a fine paste. (Alternatively, if you have a large mortar and pestle or traditional molcajete, you can combine all of the ingredients in the bowl and use the handle to press down and smash the aromatics.)
Use a spoon to scoop the avocado flesh into a large bowl, then add the smashed vegetables from Step 1 and all remaining listed ingredients (lime juice – Tajín). Use a wooden spoon to gently smash the avocados to your desired consistency and stir to combine well. Taste and adjust seasoning as desired – depending on the size of your avocados, you may need a little extra salt or lime juice.
Transfer the guacamole to a serving dish. Garnish with additional cilantro and serve immediately with tortilla chips. This guacamole is also a wonderful add-on for any of your favorite tacos, taco salads, burrito bowls, nachos, and more. Enjoy!
