Creamy Cajun Chicken Spaghetti with Garlic Mozzarella Sauce

Ingredients:

1 pound boneless, skinless chicken breasts, cut into bite-sized pieces

2 tablespoons olive oil

1 pound spaghetti

4 tablespoons butter

3 cups whole milk

1 cup chicken broth

8 ounces cream cheese, softened

2 cups shredded mozzarella cheese, divided

1/2 cup grated Parmesan cheese