Creating the High Protein Casserole Chicken Parmesan is a breeze if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Chicken: Season the chicken breasts with salt and black pepper on both sides.
3. Coat Chicken: In a shallow dish, mix the breadcrumbs, garlic powder, and Italian seasoning. Coat each chicken breast in the breadcrumb mixture.
4. Sear Chicken: In a large skillet over medium heat, add a drizzle of olive oil. Sear each chicken breast for about 3-4 minutes on each side until golden brown. Remove from heat.
5. Layer Ingredients: In a casserole dish, spread a thin layer of marinara sauce at the bottom. Place the seared chicken breasts on top.
6. Add Sauce: Pour the remaining marinara sauce over the chicken, ensuring it is well covered.
7. Add Cheese: Sprinkle the mozzarella and Parmesan cheese evenly over the sauce.
8. Bake: Cover the casserole dish with aluminum foil and bake in the preheated oven for 20 minutes. Then remove the foil and bake for an additional 10 minutes until the cheese is bubbly and golden.
9. Garnish: Once baked, remove from the oven and let it cool for a few minutes. Garnish with fresh basil leaves if desired.

These steps will guide you effortlessly in creating this incredible casserole that’s sure to impress!