Cook spaghetti according to package directions. Meanwhile, in a large skillet, cook beef and onion over medium heat until meat is no longer pink; crumble beef; drain., Drain spaghetti; add to beef mixture. Stir in the beans, tomatoes, mushrooms, water, chili seasoning and Parmesan cheese. Cover and simmer for 10 minutes. Sprinkle with mozzarella cheese.