I'm so excited! After a thirty year search I have found it!
羊肝 (yáng gān)!
Yes! Lamb's liver! Lamb leg meat has hitherto been the only ovine meat available. Generally, southern Chinese tends to avoid lamb / mutton, whereas northern and western China can't get enough. In fact, China has the largest number of domestic sheep in the world.
This southern aversion has been changing as street-side spicy grilled lamb skewers have spread across China. Yet, until now, no offal.
One supplier is carrying limited stock and urging customers to be quick as it is only available for a short time in the morning. So I got up early!
I have to buy the whole liver. No hardship! 800g for $8.50 USD.
