First, cut your avocado in half.

Remove the seed, and scoop out all the goodness.  Put it into a bowl and mash it a little.

Mince your garlic, then add it to the bowl.

Chop your onion and add that too.

Add your cilantro, then squeeze your lime juice in.

Chop your tomato and add that, too, along with sea salt.

Stir it all together.