Fresh Guacamole

I can't remember where I got this one from originally but I sent it to Patrick in 2008 when he had 4 avocados on hand.

3 avocados
2 tbls grated onion
half a bundle of cilantro
1-2 cloves of garlic
2-3 limes or lemons (squeezed)
salt to taste
diced tomatoes to taste

Mash avocados with whisk until semi-smooth, add ingredients and mix well.