1. Place meat and onion in slow cooker.
2. Mix Seasoning, tomatoes and water until blended. Pour over top. Cover.
3. Cook 8 hours on LOW or 4 hours on HIGH. Remove pot roast to serving platter. Stir sauce before serving. Serve with hot cooked noodles or pasta, if desired.
Slow Cooker Tip: For best results, do not remove cover during cooking.