Thinly slice your dates and load into a jug. Pour in boiling water and mix with a fork. Then allow to rest whilst you get your other ingredients ready. Once they have soaked for an hour, drain, and allow to cool.
In the instant pot add your trivet and then add your pudding basin with foil. Pour enough boiling water to cover up to ¼ of the bottom of the basin. Place the lid on the instant pot, set the valve to sealing and cook for 25 minutes on pressure cook.