Set the pumpkin in an instant pot liner with the trivet insert in the bottom.
Add 1 cup of water and cook on high pressure for 15 minutes.
Remove the pumpkin from the instant pot once it is done steaming cut the top off scoop out the seeds and then scoop out the meat into a bowl and mash like potatoes.
Store in airtight containers in the refrigerator for up to one week or the freezer for three months.