Osechi Kuri Kinton (栗金団, candied chestnut and sweet potato mash)

Kuri kinton looks like treasure because it is meant to. In the osechi box, where each little dish carries a wish for the year, this one speaks in gold: prosperity, good fortune, a bright beginning. It can look more difficult than it is. Really, it is sweet potato cooked gently, mashed smooth, and folded around whole candied chestnuts.

The one detail that decides it is the sweet potato. Use satsumaimo if you can, yellow-fleshed and dense, because its sweetness and color are already close to the dish we want. Soak the cut pieces well before simmering. That isn't fussing. It draws away surface starch and some bitterness, so the finished mash tastes clean and shines rather than turning muddy.

We add kuchinashi, dried gardenia pod, for the deep yellow color. It gives the mash its New Year brightness without changing the flavor much, which is exactly the kind of quiet work a good ingredient should do. Mash while the potato is hot, then cook it with syrup until glossy and thick enough to hold a soft mound. Too stiff and it eats like paste. Too loose and it slumps in the jubako, looking embarrassed, which is no way to greet January.

Fold the chestnuts in at the end so they stay whole. That is the kindness here: smooth gold around round pieces of chestnut, restrained and jewel-like. Leave it room in the lacquer box. Ma, the empty space, makes even a sweet spoonful feel composed.