Cold sesame noodles are a popular Chinese dish made with thin wheat noodles, sesame sauce, and a variety of seasonings, including soy sauce, vinegar, sugar, ginger, and garlic. It is often garnished with sliced green onions and sesame seeds and served cold, making it a refreshing and flavorful option for warm weather. The dish can be customized to personal taste by adding vegetables, protein, or spicy elements.