Step 1

Cook the pasta according to package instructions. Drain, rinse and set aside.

Step 2

Preheat the oven to 375 F degrees. Grease a 9x13-inch baking dish.

Step 3

Melt the butter in a large skillet over medium heat. Add the garlic and cook for 30 seconds until aromatic. Whisk in the flour and cook for 1 more minute to cook off the raw taste flour.

Step 4

Add the broth and half and half, then bring to a simmer, whisking constantly until sauce thickens.

Step 5

Stir in the onion powder, Italian seasoning, red pepper flakes, salt and pepper. Whisk in the Parmesan cheese and 2 cups of the mozzarella cheese. Stir until the cheese has melted.

Step 6

Add the pasta and chicken to a large bowl. Pour the sauce over and toss everything really well.

Step 7

Transfer the pasta to the prepared baking dish and top with remaining mozzarella cheese.

Step 8

Bake uncovered for 20 minutes until the cheese is bubbly and starts to brown.

Step 9

Garnish with parsley and serve.