Basil pesto is traditionally made with a mortar & pestle. If you are going to try the mortar & pestle way, start with garlic, salt, nutritional yeast, then pine nuts, and add the basil leaves in several parts. Then finish it off by adding the olive oil in.
Nutritional yeast is not the same with baking yeast. Do not substitute with baking yeast! Your pesto will be ruined.
Once you toss the zucchini pasta with pesto, it starts to slowly release more water from the salt in the pesto, so it's important to ring out the noodles well right before you toss it with sauce.
Basil pesto tossed with zucchini pasta will keep for 2 day in the refrigerator but it does start releasing water, so I recommend not keeping it for too long.
How to store basil pesto:
You can either refrigerate or freeze pesto. If you refrigerate, it'll keep for 1 week, and if you freeze it, it'll last for 3-4 month.
To keep in the refrigerator, put the pesto in an airtight container like a glass jar, and pour in some olive oil until the pesto is completely submerged under the olive oil. This will prevent the pesto from turning color and going bad.
To keep in the freezer, put the pesto into the ice cube tray. Pour in the olive oil until the pesto is submerged under the olive oil, and put it in the freezer. Once the pesto is frozen, put the pesto cubes into a ziplock bag and store it in the freezer.