Stuffed Black Moss Coin Roll

Hair moss (发菜, Nostoc flagelliforme) has been eaten in northwest China for over two thousand years, with records traceable to the classical Chinese glossary Erya (《尔雅》); Tongxin, Lingwu and Zhongning in Ningxia have historically been among its most important harvesting grounds, prized for the moss's jet-black colour and supple, hair-like filaments. Regional accounts attribute the 酿金钱发菜 preparation — its rolled, steamed-and-sliced form — to the Tang banquet kitchen (相传始于盛唐), when cooks began shaping ingredients into coin forms to symbolise wealth and good fortune. A folk legend reinforces the symbolism: the Tang dynasty tycoon Wang Yuanbao, said to be among the wealthiest men of his era, reportedly ate hair moss daily and credited it with his fortune, cementing the link between 发菜 and the phrase 发财. The dish appears among the formal courses of Ningxia's halal ten-bowl banquet. In 2000, China's State Council banned the harvesting and sale of 发菜, and it was subsequently designated a Class I state-protected wild plant; commercial supplies now come primarily from cultivated stock.

A coin of cloud-soft egg crepe encases a ring of black moss with an inner core of smooth chicken paste. The moss carries an oceanic, mineral whisper. The clear chicken broth underneath pulls everything together with warmth and clarity.

Hair moss (Nostoc flagelliforme) owes its distinctive texture to a polysaccharide mucilage that binds water vigorously; upon hydration, dry filaments expand four-to-five-fold, becoming elastic and cohesive — ideal for laminating into the roll without adhesives. The chicken paste forms a gel matrix during steaming: myosin proteins denature at 65–70 °C and cross-link, setting the filling firmly while retaining moisture. Steaming rather than boiling protects the delicate egg crepe, as 100 °C steam avoids waterlogging or tearing the thin sheet. Allowing the roll to cool slightly before slicing lets the gel firm fully, so the coin rounds hold their shape cleanly when reheated in broth.