Mongolian Beef is a flavorful and tender Chinese dish that is made with thinly sliced beef, green onions, and a savory sauce. The beef is marinated in a mixture of soy sauce, cornstarch, and garlic, which helps to tenderize the meat and infuse it with flavor. The beef is then stir-fried with green onions and a sauce made with soy sauce, hoisin sauce, and brown sugar, which creates a rich and savory glaze. Mongolian Beef is typically served with steamed rice or noodles, making it a satisfying and delicious meal.