To the bowl of a food processor, add the basil, pepitas, and garlic. Process until finely chopped.
Add the parmesan and lemon juice and blend to combine. Drizzle in the oil with the processor running and blend until smooth. Season to taste with salt and pepper.
Store in an airtight container in the refrigerator for up to one week.
Notes
Substitute pepitas with walnuts, almonds, pistachios, pecans, macadamia nuts, or pine nuts. Choose what you love or have readily available.