Boil the beef shin for 10 minutes. Rinse it under cold water and drain it well.
In a large pot, put in beef and all remaining ingredients, except potatoes, brown sugar, white wine vinegar and salt. Boil for 20 minutes. Reduce heat to low, and simmer for 1 ½ hours, until beef is tender.
Add potatoes, and cook until tender, around 15 minutes.
Stir in brown sugar and vinegar. Taste to adjust the sweet and sour balance. Season with salt before serving.
