For an extra layer of flavor, consider adding a splash of white wine or chicken broth to each packet before sealing. Ensure the parchment packets are well-sealed to create a steaming environment, which helps cook the chicken evenly and infuses it with flavor. Feel free to substitute the chicken legs with chicken breasts, adjusting the cooking time accordingly. Thinner cuts may require less time. Experiment with different types of pesto, such as sun-dried tomato pesto or kale pesto, to customize the flavor profile.