Directions:

1. Preheat Oven: Preheat your oven to 375°F (190°C). Spread the marinara sauce evenly across the bottom of an 8×8 baking dish.
2. Layer Cheese and Herbs: Sprinkle the mozzarella cheese over the sauce, followed by an even layer of chopped basil.
3. Prepare Chicken: Season both sides of the butterflied chicken breasts with salt and pepper. Arrange the chicken in a single layer over the mozzarella in the baking dish.
4. Prepare Topping: In a separate bowl, combine the panko breadcrumbs, grated Parmesan cheese, chopped parsley, and dried oregano. Mix well.
5. Top Chicken: Evenly sprinkle the breadcrumb mixture over the chicken breasts, ensuring good coverage for a crispy topping.
6. Bake: Place the baking dish in the oven and bake for 1 hour, or until the chicken is thoroughly cooked and the topping is golden brown.
7. Cool and Serve: Let the casserole cool slightly before serving. This allows the flavors to meld together beautifully.

Serve: Serve this Chicken Parmesan Casserole hot, perhaps with a side of steamed vegetables or a light salad, for a complete meal.

This Chicken Parmesan Casserole is the perfect solution for busy weeknights, offering both simplicity and flavor in one delicious dish. Enjoy the harmonious blend of tender chicken, rich tomato sauce, and cheesy goodness with minimal fuss and maximum taste.