2 Ripe avocados

1 Small tomato

1 Small onion

1 Lime

Cilantro (optional)

Peel avocado, remove pit, and mash avocado in a bowl.  Remove seeds from tomato and dice into small pieces.  Dice onion finely.  Mix avocado, tomato, and onion well.  Squeeze in the juice from fresh lime and mix.  Salt to taste.  Add cilantro if using.