Step-by-Step Instructions

1. Marinate the Chicken:
   • Place the chicken breasts in a resealable plastic bag or shallow dish. Pour the Italian dressing over the chicken, ensuring each piece is well-coated. Seal the bag or cover the dish and refrigerate for at least 30 minutes, or up to 4 hours for more flavor.
2. Preheat the Grill and Oven:
   • Preheat your grill or grill pan to medium-high heat. Preheat the oven to 350°F (175°C).
3. Grill the Chicken:
   • Remove the chicken from the marinade and pat dry with paper towels. Grill the chicken breasts for about 5-7 minutes per side, or until the internal temperature reaches 160°F (71°C). Remove from the grill and set aside on a baking sheet.
4. Prepare the Parmesan Crust:
   • In a small mixing bowl, combine the grated Parmesan cheese and panko breadcrumbs. Set aside.
5. Prepare the Topping:
   • In another bowl, mix together the shredded mozzarella, grated Parmesan, mayonnaise, and sour cream until well combined.
6. Assemble and Bake:
   • Spread a layer of the mozzarella mixture over each grilled chicken breast. Sprinkle the Parmesan-panko mixture on top of the mozzarella layer.
7. Finish in the Oven:
   • Place the baking sheet with the chicken breasts in the preheated oven. Bake for about 10-15 minutes, or until the cheese is melted and the Parmesan crust is golden brown and crispy.
8. Serve:
   • Remove the chicken from the oven and let it rest for a few minutes. Garnish with fresh parsley, if desired, and serve hot.