Step 1

Put all the ingredients except the olive oil in the bowl of a food processor. Stuff the arugula down, if necessary.

Step 2

Pulse the machine until the arugula breaks down, scraping the sides of the bowl once or twice, and then drizzle in the oil until you have a smooth sauce. Taste the pesto and adjust the seasonings if you need to.

Step 3

Store in an airtight jar in the refrigerator until ready to use.