An Oyster Omelet is a Teochew-born dish widely known for its savory taste. It is native to Chaoshan along with Fujian, Taiwan, and many parts of Southeast Asia such as the Philippines and Thailand due to the Teochew diaspora’s presence. In some southern regions of China, variants of the dish also preside.
Taiwanese cuisine is often associated with influences from the mid-to-southern provinces of mainland China. This dish is most notably from the southern part of Fujian, which regularly contributes to the identification or grouping of’ Southern Fujian cuisine.
However, after the Kuomintang withdrawal to the island, which brought along most Chinese mainland cuisines, influences from all of mainland China can easily be found. Therefore, you may be able to find different variations of this dish, depending on the area you are in.