Scrub skin of sweet potatoes with a brush until clean. Pour water into Instant Pot. Place steamer basket (the one that comes with the Instant Pot works great) in the bottom of the Instant Pot. Place sweet potatoes on top of/inside steamer basket.
Secure the lid and turn valve to seal.
Use the manual mode of Instant Pot and set to pressure cook on high for 15 minutes.
Allow pressure to “release naturally” (You do this by doing nothing after the cooking time goes off - the Instant Pot will automatically go to Warm and pressure will slowly release naturally) - takes about 10 minutes.
Once the pressure valve lowers, remove lid and serve immediately.
You can also store in the fridge for 3-4 days in an airtight container.