Dice onion and mince garlic. (Or simply place in food processor and pulse a few times.)
Place all ingredients in a large food processor or good blender. (I use my 9 cup food processor.) Blend for about 10 seconds to combine. Blend longer to achieve a smoother consistency, or shorter for chunkier salsa.
Taste and adjust flavors or add more salt if desired. Can serve right away, but tastes best after it chills for a couple hours or overnight (which also mellows the raw onion & garlic). Store in an airtight container in the fridge for up to a week.
