This is based upon a Cook's Illustrated recipe that I found and lost a number of times. As a result, I have a vague recollection of the original recipe and now just wing it. It's delicious, if I do say so myself.
One note: there's no cilantro because I can't stand it. But if you're one of those people who's in love with the evil stuff, there's no reason you couldn't add it in.
2 ripe avocadoes
¼ to ½ jalapeno pepper, diced
1 clove garlic, diced
2 Tbsp. fresh diced red onion
Juice of ¼ to ½ lime
Prepare avocadoes and, in a small bowl, mash the one and a half of the chopped avocado with a fork. Add jalapeno, garlic, onion, and lime juice, mixing to combine. Gently fold in remaining avocado cubes so as not to mash. Add salt to taste and more lime juice if needed. Serves 2-3.