1. Combine all the ingredients in a food processor and process until smooth. If a mortar and pestle is used, then add oil after all the other ingredients are ground. Refrigerate in a glass container. Paste keeps well for several months.
2. We have also found the paste freezes well, and keep for several years, in vacuum sealed bags. Put the paste into the bag, let it chill a little in the fridge and then seal the bag. When we need it, we pop the bag briefly in the microwave or let it sit on the counter for a few minutes, open the bag, chop out the amount we need and reseal the bag.