What is the main ingredient in "egg foo young" and how is it typically served?

Egg foo young is a Chinese-American dish primarily made from eggs, which are beaten and mixed with a variety of ingredients such as vegetables (like mushrooms, bean sprouts, and onions), and sometimes meats (such as chicken, pork, or shrimp). The mixture is then fried in a skillet to form omelet-like patties. Egg foo young is typically served with a savory brown gravy, often made from soy sauce and chicken broth. It is usually accompanied by steamed rice and is popular in Chinese-American restaurants.