Making Chicken Parm Casserole is simple. Just follow these easy steps to deliciousness:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Cook Pasta: Boil pasta according to package instructions until al dente. Drain and set aside.
3. Prepare Chicken: In a large mixing bowl, combine shredded chicken, marinara sauce, Italian seasoning, salt, and pepper. Mix thoroughly until chicken is evenly coated.
4. Combine Pasta and Chicken: Add the cooked pasta to the chicken mixture and stir until well mixed.
5. Layer Ingredients: In a greased 9×13-inch baking dish, layer half of the pasta and chicken mixture. Sprinkle with half of the mozzarella and Parmesan cheese.
6. Repeat Layers: Add the remaining pasta and chicken on top, followed by the rest of the mozzarella and Parmesan cheese.
7. Drizzle Olive Oil: Drizzle olive oil over the top layer to add a nice flavor and help with browning.
8. Cover with Foil: Cover the dish loosely with aluminum foil to avoid over-browning while cooking.
9. Bake: Place in the preheated oven and bake for 30 minutes.
10. Uncover and Brown: After 30 minutes, remove the foil and continue baking for an additional 10-15 minutes or until cheese is bubbly and golden brown.
11. Garnish: Remove from the oven and let sit for 5-10 minutes. Garnish with fresh basil before serving.

By following these straightforward steps, you’ll have an absolutely delicious Chicken Parm Casserole to amaze your family and friends!