Make sure the sticky rice is soaked in cold water for at least 30 minutes before cooking.
Combine one cup of coconut milk, one cup of water, and 1 cup of uncooked sticky rice in the rice cooker. Once you've filled your rice cooker pot with rice, coconut milk, and water, turn it on.
During the rice's cooking, cut the mangoes into cubes and chill until needed.
Stir 1 cup of coconut milk with sugar and salt in a small saucepan on low heat until sugar dissolves. Let the coconut milk simmer constantly while stirring, then remove from heat.
Serve sticky rice with chilled mangoes. Pour the warm coconut milk mixture over the sticky rice.
Garnish with roasted sesame seeds.
Serve warm and enjoy!