Creating Baked Chicken Parmesan Casserole is easy when you follow these steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare Chicken: Season the chicken breasts with salt, pepper, garlic powder, onion powder, and Italian seasoning.
3. Cook Chicken: In a large skillet over medium heat, cook the seasoned chicken for about 6-7 minutes on each side until cooked through. Remove from heat and let it cool slightly.
4. Shred Chicken: Once cooled, shred the chicken into bite-sized pieces using two forks.
5. Cook Pasta: Boil the pasta according to package instructions until al dente. Drain and set aside.
6. Combine Ingredients: In a large bowl, mix the shredded chicken, cooked pasta, and marinara sauce until well combined.
7. Layer in Casserole Dish: In a greased 9×13-inch casserole dish, spread half of the chicken and pasta mixture evenly.
8. Add Cheese: Sprinkle half of the mozzarella cheese and half of the Parmesan cheese over the mixture.
9. Repeat Layers: Add the remaining chicken and pasta mixture on top, followed by the rest of the cheese.
10. Bake: Cover the casserole with aluminum foil and bake for 20 minutes. Remove the foil and continue baking for an additional 10-15 minutes, until the cheese is bubbly and golden.
11. Garnish: Remove from the oven and let it cool for a few minutes. Garnish with fresh basil leaves before serving.

Following these steps will help you create a mouthwatering Baked Chicken Parmesan Casserole that everyone will love!