Creating High-Protein Spinach and Artichoke Chicken Casserole is a straightforward process. Follow these steps for a delicious outcome:

1. Preheat your oven to 350°F (175°C).
2. In a large mixing bowl, combine the shredded chicken, thawed spinach, chopped artichokes, Greek yogurt, mozzarella cheese, and Parmesan cheese.
3. Add the garlic powder, onion powder, salt, black pepper, and Italian seasoning to the mixture. Stir until well combined.
4. Transfer the casserole mixture to a greased 9×13-inch baking dish, spreading it evenly.
5. If you prefer a crunchy topping, sprinkle breadcrumbs evenly over the top of the casserole.
6. Bake in the preheated oven for 30-35 minutes or until the casserole is bubbly and golden brown on top.
7. Once done, remove from the oven and let it cool for a few minutes before serving.

These easy-to-follow instructions will guide you in creating a flavorful and protein-rich casserole that everyone will enjoy!