Pour 2 cups of water into the insert. Place the trivet in the insert, and put the uncovered bowl on the trivet. Create a foil sling to easily pull out the pudding from inside the Instant Pot.
Cover with lid, leaving the sealing valve open so it can vent and set to Saute function.
Once cooker starts to steam, if using an electric cooker, set to "Less Heat" Saute function. (If using Instant Pot, the "Adjust" button allows you to change Saute setting.)
Then steam the pudding for 15 minutes. After steaming, seal the release valve of cooker and turn off from Saute cycle, then set to high pressure for 35 minutes.
Once cycle is complete, if using an electric cooker, press Cancel and let naturally release for 30 minutes or up to 1 hour.
Carefully lift out the pudding using the foil sling (be careful, the sides of the pot will still be hot).
If there are water droplets on the pudding when you remove it from the Instant Pot, gently dab with a paper towel or clean cloth.
Run a knife around the top edge to help the pudding release from the sides of the bowl before inverting on a plate.