Slice the avocados in half. Remove the pit, then scoop the flesh into a bowl, reserving the peel for serving.
Mash the avocado with a fork, then stir it a bit. Stir in the garlic and onions.
Add the cumin, cayenne, salt and pepper. Stir again.
Add the lime juice and olive oil. Stir vigorously to get everything well combined and to achieve a nice fairly smooth consistency (though you’ll want to leave some nice chunks of avocado).
Scoop the guacamole into the reserved peel to serve along with tortilla chips. Serve with a moderately sweet Riesling if you are so inclined!
Notes
I often reduce this recipe by half for two of us, using one avocado.