An optional first step is to sauté the orzo to toast it slightly, which adds texture and flavor. If you wish to do this, turn on sauté mode, heat the oil, then add the orzo and stir it regularly until some pieces are lightly toasted. Turn off sauté mode.
Combine the orzo, water, salt, and olive oil (if you skipped the first step) in the Instant Pot.
Secure the lid and set the vent to sealing (if necessary for your model).
Set to cook on high pressure for 3 minutes. When done, immediately release the pressure. Remove the lid and stir.
Stir in any optional add-ins, if desired.
Notes
The nutrition information is calculated without any additions.