Preheat Oven:
Preheat oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.

Cook Pasta:
Cook rotini according to package directions until al dente. Drain and set aside.

Mix Ingredients:
In a large bowl, combine cooked pasta, chicken, Alfredo sauce, garlic powder, Italian seasoning, salt, and pepper. Mix until evenly coated.

Assemble:
Pour mixture into prepared baking dish. Sprinkle mozzarella and Parmesan cheeses evenly over the top.

Bake:
Bake for 20–25 minutes, or until cheese is melted, bubbly, and golden brown.

Serve:
Garnish with chopped parsley or basil if desired. Serve warm for a creamy, cheesy comfort meal!