Grilled Mongolian Beef is a flavorful and tender dish that combines marinated beef with a sweet and savory sauce. The beef is marinated in a mixture of soy sauce, ginger, garlic, and brown sugar, then grilled to perfection. The sauce is made with soy sauce, hoisin sauce, brown sugar, and red pepper flakes, creating a delicious glaze for the beef. Serve this dish with steamed rice and vegetables for a complete and satisfying meal.