I make this in a chopper, but you can use a blender or food processor. Just be careful or you'll end up with soup. Use the chop setting on a blender just a few seconds at a time, punching the ingredients down periodically with a wooden spoon.

Chop the garlic until it's pretty fine, add the remaining ingredients (remove stems and seeds from the jalapenos) and chop to desired consistancy. You can add more peppers or more tomato sauce until you get the flavor and consistancy you like.