Making Creamy Beef Alfredo Ziti Casserole is simple if you follow these easy steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Cook the Ziti: Boil a large pot of salted water and cook the ziti according to package instructions until al dente. Drain and set aside.
3. Brown the Beef: In a large skillet, heat olive oil over medium heat. Add the ground beef and cook until browned, breaking it apart with a spatula.
4. Season the Beef: Sprinkle in garlic powder, onion powder, Italian seasoning, salt, and pepper. Stir to combine and cook for another 2-3 minutes.
5. Combine Ingredients: In a large mixing bowl, combine the cooked ziti, browned beef, and Alfredo sauce. Mix until the pasta is evenly coated.
6. Layer the Casserole: In a greased 9×13-inch baking dish, pour half of the pasta mixture. Sprinkle half of the mozzarella and Parmesan cheese on top. Add the remaining pasta mixture and top with the rest of the cheese.
7. Bake: Cover the dish with aluminum foil and bake in the preheated oven for 20 minutes. Remove the foil and bake for an additional 10-15 minutes, or until the cheese is bubbly and golden.
8. Garnish: Once done, remove from the oven and let it cool for a few minutes. Garnish with fresh parsley if desired.

These straightforward steps will guide you in creating a delicious Creamy Beef Alfredo Ziti Casserole that everyone will love!