Mast-o musir
Every kebab house in Tehran puts a little bowl of mast-o musir on the table beside the chelow, and at home it sits next to Friday lunch the same way. Musir is a wild mountain shallot from the Zagros, sold dried in slices; once soaked it is mild, garlicky and faintly sweet, and it gives thick yogurt a sharp bite. The one mistake to avoid is skipping the long soak, which leaves the shallots tough and bitter. If you cannot find musir, see the swap in the steps. Chef's tip: make it a few hours ahead; the shallot flavour deepens as it sits in the fridge.



