Crispy Cabbage with Sugar Walnuts

This is a popular vegetable starter in many Chinese restaurants in the UK, where it is known as ‘Fried Seaweed’. In northern China, as I understand, there is a true seaweed dish to be had (which I have never eaten), but I should be very much surprised if it is available in Britain. In my experience, the ‘seaweed’ is shredded, dried and deep-fried fresh Chinese greens. The taste is fine but I prefer the version offered here, from the Sichuan Garden restaurant in Hong Kong. It uses a tinned p