Step 1

Preheat the oven to 350°. Lightly spray a 13x9-inch baking dish with cooking spray.

Step 2

Cook the spaghetti according to the package instructions. Drain, rinse with cool water and set aside in a large bowl or back in the same pot.

Step 3

In a medium saucepan over medium heat, add the tomatoes, cream of mushroom, cream cheese, bell pepper, onion, garlic powder, and onion powder. Cook, stirring occasionally, until cream cheese is melted and fully incorporated into the sauce. Pour mixture over the spaghetti, tossing to coat. Fold in the chicken and 1½ cups cheese. Season with salt and pepper to taste.

Step 4

Transfer the spaghetti mixture into the prepared baking dish and sprinkle with the remaining ½ cup of cheese. Cover loosely with foil.

Step 5

Bake for 30 to 35 minutes or until the mixture is bubbling. Uncover and turn the oven to Broil. Broil until the cheese is bubbling and just starting to brown, about 2 to 3 minutes. Let cool for 10 minutes before serving.