Process first 8 ingredients in a food processor until smooth. With processor running, slowly pour oil through food chute; process until blended. Spoon into a zip-top, heavy-duty plastic bag; store in refrigerator.
I made this with fresh ingredients from my garden except was out of spinach. I had plenty of parsley though and used it with the oregano. It still turned out great! I love pepper in my pesto so added some to give it a boost.
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