Open the can of sweetened condensed milk and pour it into one or two canning jars. Cover tightly with foil.
Place the trivet inside the pot and put the jars on top, making sure they aren't touching each other.
Fill the pot with water until the jars are submerged halfway.
Close and lock the lid, turning the steam release valve to closed. Press Meat and adjust the time up to 40 minutes. Press Start/Stop.
When cooking cycle has ended, allow a natural pressure release for 15 minutes. Open the steam release valve to vent any remaining steam and then open the lid and carefully remove the jars.
When they are cool enough to touch, briskly stir with a spoon or wire whisk until the sauce has reached a smooth consistency.