1. Wash and soak the rice, then drain it.
2. Heat the oil in a large saucepan and add the onion, cumin seeds, cardamom pods, cinnamon sticks, cloves and peppercorns.
3. When the onion has softened, add the garlic, ginger, chillies and coriander and cook for 2 mins.
4. Next, add the tomatoes, peas, potatoes, water, salt and rice and stir.
5. Bring to the boil, cover and simmer on a low heat for 40 mins, until the rice has cooked.
6. Add the butter in blobs while the pulao is still hot.

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