COMBINE the rice, milk, sugar, and salt in your Instant Pot. Whisk together and secure the lid.
COOK at high pressure for 10 minutes and use a natural release.
WHISK the cooked rice and milk mixture well. Temper the eggs by slowly adding 1 cup of the hot milky rice to the eggs while whisking constantly. Add that mixture to the Instant Pot slowly, whisking the whole time.
TURN on the Sauté function. Whisk until the mixture is simmering and starting to thicken up. Turn off the Sauté function.
ADD the black sesame paste and vanilla and mix well.
ALLOW the rice pudding to cool. It will thicken greatly as it sits. Serve warm or cold topped with fresh mango.