Zoni

Zoni — also written ozoni — is a Japanese New Year soup containing mochi. Wikipedia documents it as a traditional Oshogatsu (New Year) dish with strong regional variations. The Edo (Kanto) tradition uses rectangular mochi in a clear dashi broth; the Kamigata (Kansai) tradition uses round mochi in a white miso broth. The dish is said to have originated as a samurai-field camp meal (the name means mixed boil) and became associated with the New Year celebration during the Muromachi period (1336-1573), when it was served at the first meal of the year.

A bowl of zoni brings up one or two pieces of toasted mochi — soft and stretchy on the outside, still holding their shape — in a clear, savory broth with slices of chicken, carrot, and kamaboko. The mochi, having absorbed the broth, is pillowy and warm; the broth is clean and celebratory. Eaten on New Year's morning, it is the most culturally significant single dish in the Japanese calendar.

Zoni rests on the toasted mochi in broth. The mochi — glutinous rice cake — is toasted until it puffs and the surface crisps, then placed in the hot broth. The hot broth rehydrates the mochi's toasted surface, turning it soft and pillowy, while the interior stretches into long, chewy strands. The broth itself — whether the clear Kanto dashi or the Kansai white-miso — provides the umami base (glutamate from dashi or from miso's fermented soybeans) that seasons the bland mochi. The regional differences — square vs round mochi, clear vs miso broth — reflect historical foodways: square mochi was cut from sheets in the samurai Kanto culture; round mochi was hand-formed in the imperial Kansai culture.