Put cooked spaghetti into 9x13-inch baking dish. Place chicken on top of spaghetti.
In medium saucepan heat together soup, water, butter, and bouillon. Bring to a boil and then pour over the pasta and chicken. Put shredded cheese (to taste) on top and press down a bit.
Bake at 350 degrees F (175 degrees C) for 25 minutes.
