Avocado-buying tip: I like the ones that feel like a Pinky ball, or with slightly more give. Please don’t pull the stems out of them to check; it ruins all the ones you leave behind for others.
Mix the onion, jalapeño and cilantro in the bottom of a medium bowl.
Add lime and salt. Cut avocado in half and remove the pit.
Use a knife to score each half in a grid pattern, being careful not to cut through the skin of the avocado. Run a soup spoon between the avocado and skin to scoop the chunks cleanly into the bowl.
Turn them over a few times to coat them with the dressing.
Taste mixture, adding more of other ingredients to taste.
Use a fork to mash chunks to desired consistency, or not at all.
Try not to eat this bowl by yourself, although it will be hard.
Do you have to make your own tortilla chips? No, that’s just for crazy people and/or people who bought a gazillion soft corn tortillas a few months ago and even with a serious taco habit, cannot get through them. Should you feel so inspired, cut your small corn tortillas into 8 wedges a neutral oil, heat a puddle of neutral oil over medium until a droplet of water dropped in hisses and sputters and fry the chips, flipping as needed, for a couple minutes on the first side and usually just one on the second. Look for golden edges but take them out slightly on the pale side as they like to keep cooking for a short bit. Drain on paper towels or a paper bag and immediately sprinkle with fine salt; it doesn’t stick the same if you sprinkle it on once they’re cool.