Rinse glutinous rice several times until the water is clear.

Soak rice in cold water for at least 2 hours, or up to 24 hours.

Drain the soaked rice using a fine-meshed sieve or colander.

Steam the rice over simmering water, covered, for 15 minutes.

Flip the rice over and continue steaming, covered, for 10 minutes, or until translucent and glossy.

Taste and continue steaming if needed until fully cooked.

Turn off heat and fluff the rice with a wooden spoon. Let rest for 5 minutes.

While rice cooks, combine coconut milk, sugar, and salt in a saucepan over low heat.

Cook and stir until sugar is dissolved.

Set aside the coconut milk mixture.

Place warm rice in a serving bowl.

Pour coconut milk mixture over rice and stir well.

Let the rice absorb the mixture for 10 minutes, then stir in coconut cream.

Serve warm or at room temperature with mango slices.