01 - Rinse glutinous rice thoroughly under cold running water until water runs clear. Soak the rice in ample water for a minimum of 4 hours or overnight.
02 - Drain soaked rice and transfer to a cheesecloth-lined steamer basket. Steam above simmering water for 25 to 30 minutes, until grains are tender and translucent.
03 - Warm coconut milk, granulated sugar, and fine sea salt gently in a saucepan over low heat, stirring until sugar dissolves fully. Avoid boiling.
04 - Pour 1/3 cup of prepared coconut sauce into a separate bowl for serving.
05 - Transfer steamed rice to a mixing bowl while hot. Drizzle remaining coconut sauce over rice and gently fold to combine. Allow to stand 10 to 15 minutes for absorption.
06 - Portion coconut-infused sticky rice onto plates. Arrange mango slices over or beside the rice. Drizzle with reserved coconut sauce and garnish with toasted sesame seeds or mung beans if preferred.