Oyster omelette

The oyster omelette, as known as o-a-tsian, o-chien or orh luak simplified Chinese: 蚝烙; traditional Chinese: 蠔烙; Peng'im: o⁵ luah⁴) is a dish of Hokkien and Teochew origin that is renowned for its savory flavor in its native Chaoshan and Minnan region, along with Taiwan and many parts of Southeast Asia such as the Philippines, Thailand, Malaysia and Singapore due to the influence of the Hokkien and Teochew diaspora. Variations of the dish exist in some southern regions of China.

In Thailand it was adapted to mussel omelettes; most Thai people have the misconception that oyster omelettes and mussel omelettes originated from Thai cuisine rather than Chinese. In Bangkok, notable areas for oyster omelettes include Talat Wang Lang near Siriraj Hospital; Wang Lang (Siriraj) Pier in Bangkok Noi where there are two restaurants; Yaowarat neighborhood, where there is one Michelin-Bib Gourmand restaurant with Charoen Krung neighborhood in Bang Rak, among others. In 2017, the World Street Food Congress announced that oyster omelette is one of the three most notable street food among the street foods of Thailand.

The oyster omelette is a Taiwanese "night market favorite", and has constantly been ranked by many foreigners as the top dish from Taiwan. Its generous proportions and affordable price demonstrates the trait of night market cuisines. In the Philippines, English language menus often call the dish as "Oyster Cake".