Place first 5 ingredients in food processor, place lid on and pulse 4 or 5 times. Then turn food processor on full power and drizzle in 1/2 cup olive oil. Taste. Add salt and pepper as needed. Stop to scrape down the sides of the food processor with spatula. If pesto is too thick drizzle in olive oil, a tablespoon at a time, until pesto is preferred consistency.
Keyword basil, homemade, lemon, olive oil, parmesan, pine nuts