Pulse the garlic, walnuts, and salt in a food processor. Add basil in batches and chop fine. Add nutritional yeast and lemon juice, process. Stop machine and stir contents to ensure everything is incorporated. With the machine running, drizzle the olive oil through the feeder tube.

Either use immediately, or freeze in ice cube trays (pop out and store in a freezer bag once frozen) or small jars (leave 1/4 - 1/2 inch of head space to allow for expansion).