Preheat the oven to 350F and grease a 9X13 baking dish.
Fit a medium saucepan with a steamer basket and add some water. Bring to a boil.
Add the broccoli and steam for 5 minutes.
Once all the components are completed, combine the drained pasta, sauce, cooked chicken, and broccoli in a large bowl. Mix until well combined.
Pour into the prepared casserole dish and spread out evenly.
Sprinkle with ⅓ cup of Parmesan cheese. Cover with aluminum foil and bake for 20-30 minutes or until the cheese is melted and the casserole is bubbly.