Confetti Spaghetti

1 package {12 oz} spaghetti
1 lb ground beef
1 medium green pepper chopped {optional}
1 medium onion chopped {optional}
1 can {14 1/2 oz} diced tomatoes, undrained
1 can {8 oz} tomatoe sauce
1 T brown sugar
1 t salt
1 t chili powder
2 t pepper
1/4 t garlic powder
3/4 C shredded cheddar cheese

Cook spaghetti according to package directions. Meanwhile, in a large skillet, cook beef, green peppers, and onion over medium heat until meat is not longer pink; drain. Stir in tomatoes, tomato sauce, brown sugar, salt, chili powder, pepper, and garlic powder. Drain spaghetti; add to the beef mixture. Transfer to a greased 9x13 baking dish. Cover and bake at 350 degrees for 30 minutes. Uncover, sprinkle with cheese and bake 5 minutes longer or until cheese is melted