Cold ramen, also known as hiyashi chuka, is a refreshing and light dish that is perfect for hot summer days. The noodles are typically served cold and are topped with a variety of vegetables, such as cucumber, bean sprouts, and carrots. The broth is typically made with soy sauce, vinegar, and other seasonings. The toppings can vary, but typically include sliced ham, egg, and green onions. This dish is easy to make at home and can be customized to your liking by adding your favorite vegetables.