Into a food processor pop in your grated parmesan, cashews, spinach, vinegar, salt and olive oil and blitz till fine consistency or as chunky as you like.
Serve straight away or pour into a clean screw top jar, top with a little more olive oil and store in the fridge till ready to use.
Pesto can be used tossed through pasta, drizzled over veggies, chicken or even as a dip. Let your imagination go for it.