Cook pasta according to directions.
Meanwhile, combine all other ingredients in a food processor and pulse until smooth. You may need to scrape the pesto down from the sides of the food processor once, then pulse again.
Once the pasta is drained, return it to the pot. Add the pesto into the pasta, and mix together well. Add in additional salt and pepper to taste. Serve while hot.
Optional: Serve with more nutritional yeast or grated cheese to add on top of dish.