Seasoned Rice Soup (雑炊, Zōsui)

Zōsui begins with yesterday's rice, which is a kind thing for a breakfast dish to do. It doesn't ask you to cook rice from the beginning. It asks you to rinse the rice you already have, then let it warm in seasoned dashi until each grain loosens and shines.

The one detail that decides it is the washing. Cooked rice carries surface starch, and if you put it straight into the pot, the broth turns cloudy and heavy. Rinse it under running water until the grains feel separate, and the soup stays light. This is why zōsui is not okayu, the soft rice porridge made by cooking raw rice slowly with water. Zōsui is quicker, clearer, and made from cooked rice that still remembers its shape.

In winter we lean on dishes like this: warm, mild, and restorative without being dull. Chicken gives body, mushrooms bring the season, and the egg goes in last so it floats in soft ribbons instead of toughening into rubber. The dashi does the quiet work underneath. Build it properly from konbu and katsuobushi, season it with soy and a little mirin, and there is nothing hidden. The dish is plain enough to show whether you rushed it, which is rude of the dish, but useful for the cook.