To make the base sofrito (used immediately) Sauté the onion over low heat, stirring until translucent. Add the remaining ingredients and sauté, stirring until cooked-through.
To make homemade seasoning (for storage) Combine the ingredients and process in a blender or food processor until you have a thick paste.
Keep refrigerated for up to a week. Or freeze in a zippy bag for up to a month.
