Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking dish with olive oil.
In a large mixing bowl, combine the cooked rotini pasta, shredded chicken, broccoli florets, cherry tomatoes, cheddar cheese, cream of chicken soup, milk, garlic powder, onion powder, salt, black pepper, and paprika. Mix until all ingredients are well combined.
Pour the mixture into the prepared baking dish, spreading it evenly.
Sprinkle the grated Parmesan cheese on top of the casserole.
Cover the baking dish with aluminum foil and bake in the preheated oven for 25 minutes.
Remove the foil and bake for an additional 15 minutes, or until the cheese is bubbly and golden brown.
Let the casserole cool for about 5 minutes before serving.