The St. Paul sandwich can be found in many Chinese American restaurants in St. Louis, Missouri, as well as in other cities in Missouri, including Columbia, Jefferson City, and Springfield. The sandwich consists of an egg foo young patty served with dill pickle slices, white onion, mayonnaise, and lettuce between two slices of white bread. The St. Paul sandwich also comes in different combinations and specials, such as chicken, pork, shrimp, beef, and other varieties.

Egg foo young is an omelette dish found in Chinese cuisine. The name comes from the Cantonese language. Egg foo young is derived from fu yung egg slices, a mainland Chinese recipe from Guangdong.