Put a twist on traditional fried rice by adding Mongolian beef. Leftover cooked rice is stir-fried with beef, onions, garlic, and ginger, then tossed in a sauce made from soy sauce, oyster sauce, and brown sugar. The result is a flavorful and satisfying dish that is perfect for using up leftovers. This Mongolian beef fried rice is a great way to switch up your usual fried rice recipe.