Wash the Pot, and put it back in the Instant Pot with the trivet. Add 1 cup of water to the bottom of the pot.
Stuff the pumpkin with rice, followed by the steak. Put the pumpkin cap back on, then put the pumpkin in the Instant Pot and cover the Instant Pot with the lid.
Make sure that the vent is on sealing position, press on MANUAL or HIGH PRESSURE and set at 7 minutes. Allow the Instant Pot to come to pressure, and cook. When it's done, quickly release the steam and carefully open the lid. Allow it to cool down for a couple of minutes, then using the trivet handles take the pumpkin out.
If you're finding it difficult to take out of the Instant Pot, just use a medium-sized plate to hold the pumpkin and discard the water. Then using the same method, turn the pumpkin over the plate, and put it on a serving plate. Add the toasted nuts and cranberries to the pumpkin.
Cut the pumpkin into wedges or half-moons, and serve with rice, steak, and nuts. Garnish with chopped parsley leaves.