Aloo ko Achar.

Achar in Nepal covers two quite different things. There are the long-keeping pickles, vegetables salted and left under oil for months, and there are the fresh achars mixed the same day and eaten within hours, which is what aloo ko achar is. The daily Nepali plate is deliberately plain — rice, thin dal, a dry vegetable, greens — and it needs one sharp element to stop it becoming monotonous across two meals a day, every day. The fresh achar is that element, and the potato version is the most common of all because potato is cheap, stores through winter and takes on dressing readily.

The seasoning is the part that would not be made this way anywhere else in South Asia. Sesame is toasted and ground rather than used whole, which turns it into a thickener as much as a flavour — the dressing clings to the potato instead of pooling underneath. Mustard oil is heated until it genuinely smokes before the fenugreek goes in, which burns off its raw pungency; used cold it tastes harsh and metallic. The fenugreek is fried until it is very dark, almost at the point of burning, because that near-burnt bitterness is a signature Newar note rather than a mistake. And timur, the Himalayan pepper that numbs the lip, does the work that black pepper or extra chile would do further south.

The dish sits at the centre of Newar eating as well as everyday hill cooking. On the samay baji feast plate, where everything arrives at room temperature at once — beaten rice, choila, black soybeans, egg, aila — a sour potato achar is one of the fixed components, and it is also the standard partner for sel roti at Tihar. Potatoes themselves are relatively recent in the Himalaya, arriving through colonial-era trade routes, but they took hold quickly because they grow at altitudes where rice will not and store without processing. A dish that looks like potato salad to an outsider is really doing the job of a pickle, and it should be seasoned accordingly: distinctly sour, hot enough to notice, and salted harder than a salad would be.