Creamy Garlic Parmesan Chicken Pasta Bake

#### Ingredients:

- 1 pound rotini pasta, cooked and drained (save 1 cup of cooking water for casserole)

- 3 cups cooked chicken, diced or shredded

- 2 (15 ounce) jars Alfredo sauce

- 1 cup garlic Parmesan sauce

- 2 cups shredded mozzarella cheese

- ½ cup grated Parmesan cheese

- ½ teaspoon salt

- ¼ teaspoon black pepper

- Fresh parsley, chopped (for garnish, optional)

#### Directions:

1. **Preheat and Prep:**