Step 1

Put the walnuts, parsley, cheese, garlic, and salt in a food processor and pulse for a few seconds to combine. Scrape down the sides of the bowl, then pulse again.

Step 2

Drizzle in the olive oil while the machine is running just long enough to incorporate the oil, about 20-30 seconds.Use immediately or cover with plastic wrap and refrigerate to store. Will last several days chilled.Use with pasta or as a spread on bread or toast.