Rinse the rice under cold water until the water runs clear. This removes excess starch and helps with texture.
Add the rinsed rice and water to the Instant Pot.
Close the lid and set the Instant Pot to High Pressure for 12 minutes. The instant pot will take some time to heat up to start the high pressure setting.
Once the 12 minutes are done, keep the pressure valve closed, and let it sit for 10 minutes.
Prepare the Sauce
Combine the sauce ingredients in a small saucepan over medium-high heat.
Whisk until the sugar dissolves, and the mixture is warmed and slightly starts to boil. Turn off the heat, and set aside a few tablespoons of this sauce for drizzling.
Once the rice is ready, fold the warm coconut milk mixture (minus the reserved drizzle) into the rice in the Instant Pot.
Pack the sticky rice into a small bowl, to dump it upside down and form a circular mound. Lightly grease the bowl with a neutral-flavored oil, like avocado oil, to help the rice come out.
Add sliced mango on the side, sprinkle with sesame seeds and drizzle with the reserved coconut sauce. Enjoy it warm!
Notes
Storage
Store the coconut rice mixture separately from the mangoes, in an airtight container in the refrigerator for up to one day. Reheat on the stovetop or microwave with a splash of water.