Arugula Pesto

This is a great use for the bag of arugula in your share this week!
1/2 lb. arugula (the whole bag in the share)
1/2 cup walnuts
1/2 cup freshly grated Parmesan cheese
1/2 cup extra virgin olive oil
1/2 teaspoon salt, or to taste
a couple cloves of garlic
1.  Toast the walnuts in a pan over medium heat until lightly brown.
2.  In a food processor, combine the arugula, walnuts, Parmesan, salt, and garlic.  Pulse while drizzling the olive oil into the processor.
3.  Scrape the pesto into a bowl and enjoy as a topping for pasta, a sandwich spread, or any other way you would use basil pesto.
4.  Optionally, you could add basil or mint to the arugula pesto.