Place basil leaves and olive oil in a food processor. Pulse until blended and completely combined. Basil leaves should be minced and mixture will still be thin.
Scrape sides and add all other ingredients to food processor. Continue to pulse until ingredients are completely blended and combined (scraping sides between if necessary). You should end up with a thick pesto-like consistency.
If needed: add more basil leaves to thicken or add more olive oil to thin.