With a sharp knife, cut one-inch slits all over the squash. They do not have to be deep, just a way for steam to escape.
In the inner pot of the Instant Pot, place the trivet that came with it and a steamer basket. Place the squash on the steamer basket and add one cup of water to the inner pot.
Put the cover on the Instant Pot and the valve to seal, and choose high pressure. Set the timer to cook for 20 minutes.
When the timer goes off, do a quick release of the pressure and remove the cover once the pin drops.
Allow the kombucha squash to cool for ten minutes, and carefully remove the squash from the pot.
Using a knife or fork, peel off the rind.
Once the rind is removed, cut the squash in half with a sharp knife and scoop out the seeds.
Mash it with a fork and serve immediately. Or, if you want a smoother squash texture, use a food processor to puree it. Add butter, parmesan cheese, salt and pepper.