which are found today are a Cantonese hybrid both in the United States and Asia.

Literally meaning "Hibiscus egg", this dish is prepared with beaten eggs and most often made with various vegetables such as bean sprouts, bamboo shoots, sliced cabbage, spring onions, mushrooms, and water chestnuts. When meat is used as an ingredient, a choice of roast pork, shrimp, chicken, beef, or lobster may be offered.

In Chinese Indonesian cuisine, it is known as fu yung hai (芙蓉蟹, literally "Hibiscus crab" ), sometimes spelled pu yung hai. The omelette is usually made from a mixture of vegetables such as carrots, bean sprouts, and cabbages, mixed with meats such as crab meat, shrimp, or minced chicken. The dish is often served in sweet and sour sauce with peas.

In Western countries, the dish usually appears as a well-folded omelette with the non-egg ingredients embedded in the egg mixture. It may be covered in or served with sauce or gravy. Chinese chefs in the United States, at least as early as the 1930s, created a pancake filled with eggs, vegetables, and meat or seafood. In a U.S. regional variation, many American-Chinese restaurants in St. Louis, Missouri, serve what is called a St. Paul sandwich, which is an egg foo young patty served with mayonnaise, dill pickle, and sometimes lettuce and tomato between two slices of white bread.

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https://en.wikipedia.org/wiki/Egg_foo_young