The primary ingredient in traditional beef stroganoff is beef, typically in the form of tender strips or cubes. This main component is sautéed with onions and mushrooms, then simmered in a rich sauce made from sour cream, broth, and mustard. Beef is essential to the dish, providing depth of flavor and a satisfying texture. Traditionally served over egg noodles or rice, beef stroganoff is a classic Russian dish that has gained popularity worldwide. Its creamy sauce and savory ingredients create a hearty meal that is comforting and indulgent.