Mongolian Chicken Chowmein is a flavorful and hearty dish. The chicken is marinated in a mixture of hoisin sauce, soy sauce, and brown sugar, giving it a delicious flavor. The noodles are stir-fried with vegetables and then tossed with the marinated chicken. The combination of hoisin sauce and brown sugar flavors makes this dish a crowd-pleaser. Serve it with a side of steamed bok choy for a complete meal.