I visited some friends a couple of weeks ago and she had made her own salsa. It was delicious.
Here is the recipe (I'm making it right now!).
Tomatoes
Red onion
Green chilli (the little fat ones)
Fresh coriander
Lime juice
Skin the tomatoes (place in boiling water for a couple of minutes). Chop and put in a bowl.
Finely chop onion and chilli then add to bowl.
Squeeze lime juice onto the concotion and add roughly cut coriander to taste.
I've no idea of the quantities - use your intuition, nose and mouth!!