- 
        
        Trim the meat of all fat and sinew and tie with string
        so that the meat holds its shape. 
- 
        
        Heat the oil in a large heavy-based pan. Add the meat
        and cook over high heat until it browns. 
- 
        
        Remove meat from pan and set aside. 
- 
        
        Reduce the heat to medium. Add the curry powder, garlic,
        ginger, lemon grass and onion, and cook for 5 minutes or until the oil
        begins to separate from the spices. 
- 
        
        Return the meat to the pan. Add the tamarind, vinegar,
        stock and coconut mil and bring to the boil. 
- 
        
        Reduce heat, cover and simmer for 1 3/4 hours or until
        the meat is tender. 
- 
        
        Remove the meat from the pan and keep it warm. 
- 
        
        Bring the liquid to the boil and cook it, uncovered, for
        10 minutes or until a thick gravy forms. 
- 
        
        Slice the meat and serve topped with the gravy.