Add 2 tbsp salt to boiling water and gradually add noodles. Cook uncovered, stirring occasionally until tender then drain. Meanwhile saute onions in butter. Add meat. Cook until browned stirring to break up pieces. Add green pepper, tomato sauce, corn, chili powder and salt to tast. Mix well. Combine meat mixture with drained cooked noodles. Turn into 6 quart baking dish. Top with grated chees. Bake covered at 350 degrees for 1 hour.