Italian Chicken Casserole

Name: Italian Chicken Casserole
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: European, Italian, Mediterranean
Ingredients: 1 pound cooked, cubed chicken breasts (recommended grilled, can also use rotisserie to make it easier); 1 box (16 ounces) linguine; 2 tablespoons olive oil; 4 cloves garlic, minced; 1/2 cup sundried tomatoes, chopped OR roasted red peppers if you want to change it up!; 2 tablespoons cornstarch; 1 cup chicken broth; 1 cup heavy cream; 2 cups milk; 1 1/2 teaspoons kosher salt; 1/2 teaspoon fresh black pepper; 5 ounces baby spinach; 8 ounces fresh sliced mushrooms; 1/2 cup grated parmesan cheese; 2 cups shredded mozzarella cheese (or any Italian cheese blend)