Thalassery chicken biryani

On the Malabar coast of northern Kerala, the port town of Thalassery makes its biryani with kaima (jeerakasala), a tiny fragrant rice that stays separate and buttery instead of long and dry. Mappila Muslim families serve it at weddings, at Eid and at Friday lunches, the chicken cooked first in a green-chilli and tomato masala, then buried under ghee rice and sealed for dum. There is no red chilli powder in it; the heat comes from fresh green chillies, and the sweetness from cashews, raisins and deeply fried onions. Serve it with a sharp date-and-onion pickle or a simple raita. Chef's tip: toast the washed, drained rice in ghee until it smells nutty before the water goes in; it keeps every grain whole.