Add a burst of Italian flavor to your chicken shawarma with this pesto version. Using a food processor, blend together garlic, basil, pine nuts, Parmesan cheese, and olive oil to create a fragrant pesto marinade. Marinate the chicken in this mixture before grilling or roasting. The pesto adds a delicious herbal and nutty flavor to the dish, making it a unique and tasty twist on traditional chicken shawarma.