1) Melt the butter in a medium saucepan over a medium/high heat. Add the ginger and fry gently for 1 to 2 minutes, until fragrant. Add the rice, water, coconut milk and salt. Bring to a boil, reduce the heat, cover and simmer for 12 to 15 minutes, until the liquid has been absorbed, 15 minutes. Let stand 10 minutes off the heat; fluff with a fork. Garnish with coriander and cashews.