Chicken Spaghetti Casserole

Step 1

Bring a large pot of salted water to a boil, and cook the spaghetti according to the package directions. Meanwhile, in a large bowl, combine the chicken, soup, milk, onion, 1/2 cup cheddar cheese, 1/2 cup Swiss cheese, mushrooms, peppers, mayonnaise, steak seasoning and dried basil. Mix well until all the ingredients are incorporated.

Step 2

Drain the spaghetti and add it to the chicken mixture. Toss to coat everything fully, then transfer the mixture to a greased 13x9-inch baking dish. Cover and bake at 350°F for 20 minutes. After 20 minutes, uncover the dish and sprinkle the remaining cheeses over the top. Bake until it's fully heated through and the cheese is melted, 5 to 10 minutes longer.