Rinse sticky rice under cool water until the water runs clear, then soak it in enough water to cover for at least 1 hour.

Prepare your steamer while the rice soaks, bringing water to a gentle boil and lining a bowl with cheesecloth for the soaked rice.

Combine coconut milk, sugar, and salt in a saucepan over medium heat, stirring gently until dissolved.

Once rice is cooked, mix with about 1 cup of coconut sauce and allow to cool slightly.

Serve by placing sticky rice in bowls, topping with mango slices, drizzling with coconut sauce, and sprinkling with sesame seeds.