Creating Chicken Alfredo Tortellini Bake is simple when you follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Prepare the Baking Dish: Grease a 9×13-inch baking dish with olive oil or cooking spray.
3. Cook Tortellini: In a large pot, cook the cheese tortellini according to package instructions until al dente. Drain and set aside.
4. Combine Ingredients: In a large mixing bowl, combine the cooked tortellini, shredded chicken, Alfredo sauce, spinach, garlic powder, Italian seasoning, salt, and pepper. Mix until well combined.
5. Transfer to Baking Dish: Pour the mixture into the prepared baking dish, spreading it evenly.
6. Add Cheese: Sprinkle the shredded mozzarella and grated Parmesan cheese over the top of the mixture.
7. Bake: Place the dish in the preheated oven and bake for 30-35 minutes, or until the cheese is bubbly and golden brown.
8. Cool: Remove from the oven and let it cool for about 10 minutes before serving.

Following these steps will ensure your Chicken Alfredo Tortellini Bake turns out perfectly every time!