Wash 1 cup (170g) of long grain white rice, drain well in a sieve.
In a large saucepan mix water, the drained rice, butter and a pinch of sea salt. Bring to the boil, then lower the heat and cover.
Simmer gently for 12 minutes or until the water has completely absorbed. Remove from the heat and let sit, undisturbed with the lid on, for 10 to 15 minutes. Remove the lid, fluff the rice gently with a fork then serve. Optional to season with spring onions.