Place the rice in a large ovenproof bowl or baking dish. Boil the water, then add that to the dish along with the butter and salt. Cover with aluminium foil, then transfer to a preheated 180 C / Gas 4 oven. Bake for 25 to 30 minutes, then remove from oven and take off the foil. Fluff with a fork before serving.
Rice to water ratio
You might have heard about the 'rice to water ratio', which uses volume to measure both rice and water. This foolproof way of measuring is simple to remember: 1 part rice to 2 parts water. You can use a measuring cup to measure the rice and water, or even your favourite mug!