Egg Foo Young is actually an omelette just like a regular omelette is.
However the difference between an omelette and an Egg Foo Young is in the ingredients that it's made from.
The most apparent difference between Egg Foo Young and the omelet is in the filling.
The main protein in Egg Foo Young can be barbecue pork or ham.
You can even use any leftover roasted meat to prepare chicken Egg Foo Young.
You can also substitute the meat with shrimps to make shrimp Egg Foo Young.
Bean sprout is usually used to replace or use together with bamboo shoots for the crunchy textures.
In the Egg Foo Young you will also find ingredients like shitake mushrooms and scallion too.
You will not find ingredients like tomatoes, capsicums, portobello mushrooms (the Chinese use shitake mushrooms).
But onions and chives are traditionally included in the recipe for Egg Foo Young.