The Japanese consider hiyashi chuka to be summer food, and in the spirit of seasonal eating, the dish is not served at other times of the year. But in tropical and sub-tropical climates, cold noodles are refreshing whenever it's hot outside - and that's far longer than just the summer months. Usually, the cold ramen comes with a watery, refreshing, vinegar-based sauce that you pour over the noodles, but I prefer a thicker, miso-based sauce. Although ramen is usually considered a Japanese dish,...