Add all ingredients to a food processor. Process on high for 1-2 minutes, pausing once or twice to scrape down the sides, until the pesto ingredients appear finely minced.
Taste the pesto and adjust the seasoning before giving it a final few pulses. If you desire a thinner consistency, add a bit more oil.
Store homemade vegan pesto in an airtight container in the refrigerator for up to 3 days.
Notes
Nutrition facts will vary based on the brands and ingredients used.