1. Wash the rice well in several changes of cold water until the water is clear. Soak rice in the clean water about 10 to 30 min. Drain and rinse well in the sieve. Place them in your rice cooker and add 1 cup water, then start the rice cooker.
2. While the rice is cooking, combine the coconut milk, sugar and salt in a small pan and bring it to a boil, stirring until the sugar dissolved. Reduce the heat to low and add diluted cornstarch. Remove from the heat. Pour the coconut milk sauce into a small bowl and chill to let it cool.
3. Cut mango into bite-size pieces. Set aside.
4. Place the sticky rice on a serving dish and arrange the mango side of the rice. Add the sauce. Sprinkle with sesame seeds.