Toast pine nuts in a dry skillet over medium heat for 3-5 minutes until golden and fragrant.

Combine toasted pine nuts, lemon juice, garlic, sea salt, and black pepper in a food processor. Pulse for 20-30 seconds until finely chopped.

Add tightly packed basil leaves to the mixture and pulse for 15-20 seconds until finely chopped.

While processing, drizzle in olive oil and continue blending for 30-45 seconds until the desired consistency is achieved.

Optionally add Parmesan cheese and pulse briefly for about 10 seconds until incorporated.

Taste and adjust seasoning as necessary. Transfer to a bowl and enjoy!