One of the easiest things to cook in an Instant Pot is frozen shrimp. All you need is a bag of frozen shrimp a cup of water, and a steamer basket and it's done in ZERO minutes.
Set the trivet in the bottom of the inner pot and set the steamer basket on top of that.
Pour in the cold water.
Dump the frozen shrimp into the steamer basket. Lock the lid and set the vent to sealing. Set the cook time to zero on high pressure. When the time is up, do a quick release and carefully remove the steamer basket.