For the pesto, combine all ingredients but the oil and cheese into a food processor and pulse until coarsely chopped. With machine running, pour in oil.
Scrape pesto into a bowl and stir in cheese.
Prepare your favorite GF pasta, and toss with pesto. Add a bit of oil or reserved pasta water to loosen mixture if desired.
Notes
Pesto freezes great, so make an extra batch and use next time for a quick meal.