If you're doing pot in pot rice, first rinse the rice and then put it in a container which will fit in the instant pot. Now set aside for later.
Add all the other ingredients except the cornflour, sour cream and coriander (cilantro) to the pot and mix together.
Put a tall trivet in the pot and then add the pre-prepared rice with the boiling water.
Put the lid on and set to high pressure for 7 minutes.
When the time is up, leave under pressure for another 7 minutes before doing a quick release.
When the pin drops, remove the lid followed by the rice and trivet.
Stir everything together and then set the pot to saute. Add the cornflour to a bowl and add around 5tbsp of liquid from the pot. Mix together and stir back in. Bring to the boil which will thicken the sauce (this should take around 1 minute).
Serve over the rice with a garnish of sour cream and coriander (cilantro).