Preheat the oven to 425 degrees Fahrenheit. To a 9 x 13-inch baking dish, add 16 ounces uncooked rotini pasta, 3 cups cooked shredded chicken, and half of the ½ cup Parmesan cheese. Pour over 3 cups chicken broth and 1 (16-ounce) bottle Olive Garden Italian dressing.
Stir everything together, then add 1 (8-ounce) package cream cheese to the center. Cover with foil and bake for 45-50 minutes.
Remove from the oven and stir the pasta well until everything is combined.
Top with the remaining half of the Parmesan cheese. Return to the oven, uncovered, and bake for an additional 5 minutes, until the cheese is melted and bubbly.
Notes
Storing, Freezing, and Make Ahead Instructions
Fridge: Store leftovers in an airtight container in the fridge for up to 4 days. Reheat in the microwave for 1-2 minutes, until heated through.
Freezer: Freeze in a freezer-safe airtight container for up to 3 months. Thaw in the fridge overnight before reheating.
Make Ahead: Assemble the casserole and cover with foil. Store in the fridge for up to 24 hours, until ready to bake.