Creating a delicious Greek Chicken Casserole can be simple when you follow these orderly steps:

1. Preheat the Oven: Set your oven to 375°F (190°C) to prepare for baking.
2. Mix Ingredients: In a large mixing bowl, combine the shredded chicken, cooked orzo, chopped spinach, and halved cherry tomatoes.
3. Season: Add the crumbled feta cheese, dried oregano, salt, and black pepper to the bowl. Toss everything together until well mixed.
4. Transfer to Baking Dish: Lightly grease a casserole dish with olive oil. Then, pour the mixture into the dish, distributing it evenly.
5. Drizzle Olive Oil: Lightly drizzle olive oil over the top of the casserole for extra flavor and moisture.
6. Bake: Place the casserole in the preheated oven and bake for 35-40 minutes or until heated through and golden on top.
7. Let It Rest: Allow the casserole to cool for about 5 minutes before serving to let flavors settle.

Following these steps will help you successfully prepare this amazing dish, full of delightful flavors and textures!