Set your oven to 425°F to preheat.
Drizzle the melted butter into a 9x13 inch deep baking dish, then toss in the cubed chicken along with 1 tablespoon Italian seasoning, 1 tablespoon garlic powder, onion powder, salt, pepper, and chili flakes.
Layer the dry noodles and broccoli florets on top of the raw chicken mixture, then pour 1 1/2 cups water evenly over everything.
Combine the melted cream cheese with heavy cream, then whisk in the whole milk and Parmesan cheese. Season with extra Italian seasoning if you like, and scatter this creamy blend over the noodles and broccoli.
Sprinkle the shredded mozzarella or provolone on top, dust with remaining garlic powder, then cover the dish.
Bake covered for 30 minutes, then remove the cover and continue baking an additional 15 to 20 minutes until the cheese is golden and the noodles at the top have crisped nicely.
Garnish with freshly chopped parsley or basil before serving. Dish it out and enjoy your creamy, cheesy dinner!