Rinse the sticky rice thoroughly until the water is almost clear. Soak it in clean cold water for 4-5 hours or overnight to achieve the desired texture. Drain and rinse once more before cooking.
Cook the rice according to the package instructions, typically steaming it for 20-40 minutes, until it reaches a soft and sticky texture.
When the rice is done, stir in the full-fat coconut milk and sugar, combining well to coat the rice evenly.
Place the coconut-infused rice in the refrigerator for about an hour to cool and allow flavors to meld together.
Plate the rice and top with generous slices of mango. Optionally sprinkle sesame seeds for a finishing touch.
Notes
For the best texture, rinse the rice well, soak long enough, and use fully ripe mangoes for sweetness.
Try serving with vanilla ice cream or a drizzle of honey for added flavor.