@Shydinko Channel
While the fish composition of the sandwich has changed through the years to satisfy taste and address supply shortcomings, the framework of its ingredients have remained constant; a fried breaded fish fillet, a steamed bun, tartar sauce and pasteurized American cheese.
A fish sandwich is, most generally, any kind of sandwich made with fish. The term is frequently used to describe food made with breaded, fried fish, which are commonly found in fast food venues.