In a large skillet, cook the beef, onion and green pepper over medium heat until meat is no longer pink; drain., Transfer to a 5-qt. slow cooker. Stir in the tomato sauce, tomatoes, tomato paste, mushrooms, cheese, wine, olives, parsley, oregano, Italian seasoning, garlic, salt and pepper. Cover and cook on low for 6-8 hours. Serve with spaghetti.