Begin by adding all of the ingredients (except water or additional oil) to a food processor. Pulse the ingredients, scraping the sides every 10-20 seconds until they become a chunky paste.
Look at the consistency of your pesto and add water or oil until the pesto reaches your desired consistency.
Pesto can be used fresh, or to freeze put the pesto into quart bags and lay flat to freeze. Use a chop stick to crease the bag into desired portion sizes.
To use frozen pesto, break off a square and thaw in the fridge or defrost in microwave for 30 seconds.
Use the pesto as a flavorful spread on a sandwich, pizza, or as a topping for pasta.