Add the cashews, pine nuts and nutritional yeast to a food processor. Blend until the nuts are broken into very small pieces, as small as you can get them. You may need to stop blending every 15 seconds or so, to scrape down the sides of the bowl and stir.
Then add the arugula, basil, olive oil, water, garlic powder and sea salt. Blend until combined, scraping down the sides and re-blending as necessary.
Use as a spread for sandwiches, or on crusty french bread. This also goes great on Roasted Spaghetti Squash.