Cook pasta per package directions, drain and set aside. In 25 cm skillet cook onion, mushrooms and seasoning until onion is tender. Add tomatoes and tomato sauce; cook uncovered over medium high heat for another 5 minutes. Remove from heat. Stir in the pasta, green beans and half cup of shredded monterey cheese. Season to taste with salt& pepper. Stir well to mix then pour into an 8 X dozen baking dish. Top with remaining cheese. Bake at 180ºC or 25 minutes.