01 - Place garlic scapes, basil, pine nuts, Parmesan cheese, lemon juice, salt, and pepper into the bowl of a food processor. Pulse several times until the mixture is finely chopped.
02 - While the food processor is running on low speed, slowly pour the olive oil into the feed tube in a steady stream. Continue processing until the pesto reaches a smooth, spreadable consistency.
03 - Taste the pesto and adjust salt or pepper if needed. Transfer the finished sauce to a clean jar or airtight container and store in the refrigerator until ready to serve.