Kake Udon (かけうどん)

Kake udon looks almost too plain to explain. Thick white noodles sit in hot broth, with a little scallion, and that is nearly all. No pile of toppings comes to rescue it. This is why it matters. The plain bowl tells you whether the dashi is alive, whether the noodles were warmed properly, whether the seasoning was handled with a light hand.

The one detail that decides it is the broth. Make ichiban dashi from konbu and katsuobushi, then season it as kakejiru, the pouring broth. In Kanto, we make it darker and more soy-forward with koikuchi shōyu, the regular dark soy sauce. In Kansai, it stays pale amber, with more konbu in the stock and usukuchi shōyu, light soy sauce, which is lighter in color but not lighter in salt. Same dish, two voices. Neither one is pretending to be the other.

Do not boil the noodles in the broth. Boil or warm them separately, rinse or loosen them as needed, then heat them in fresh water before they meet the soup. If loose starch goes into the dashi, the broth turns cloudy and tired. Udon is humble, yes, but humble is not careless. Keep the broth clear, the noodles lively, and the bowl becomes honmono without making a ceremony of itself.