Still where is it? We get potatos from supermarkets, and breads from supermarkets and bakeries. Cooked potatos however depends on what food you named. we should have plenty potato with chicken at most restaurants.
We don't and we do. We copy/import foods from all over the world.
I can't remember exactly where I ate, I am terrible at remembering chinese names. My uncle lives close to the chinese border (shen zen?) I stayed with him there. I ate at the night market a couple of times, sitting on this little red stools and watching the street is awesome. He has a house keeper and she did really good fish and stir frys a few nights. I had crab and sea urchin roe. I didn't like that. I had a really nice thai curry one night too...
EDIT: @TinyHowie. My favourite part of the trip was when I went up and saw the giant buddah. For those that don't know, here are some pics.

http://i44.tinypic.com/mlmd0o.jpg
http://i41.tinypic.com/eun968.jpg
http://i43.tinypic.com/qntcpd.jpg
Best week I've ever had. I love HK/