Cut the tomato in half and remove the seeds and soft flesh. Then cut it into small cubes. If desired, remove the seeds from the half of the jalapeno and mince it.

In a medium bowl, mix together tomato, jalapeno, garlic, onion, cilantro, salt, black and cayenne peppers and cumin.

Halve the avocado, remove the pit and cut into cubes in the skin.  Then scoop out the avocado and add it with lime juice to the tomato mixture. Using a pastry cutter (or an avocado masher), mix the mixture until everything is well combined. Make sure to leave a few of avocado chunks, if you like it chunky.