Heat the oil in a pan. Sauté the onion and pumpkin for approx. 2 mins. Add the rice and curry and continue cooking for approx. 1 min. Pour in the stock and coconut milk, bring to the boil, cover and simmer over a medium heat for approx. 15 mins. Season the chicken with salt, add to the pan, cover and steep for approx. 5 mins. over a very low heat. Scatter the coriander over the top.