Add all of the ingredients to the bowl and add 1 cup of water and trivet to the inner liner of a 6-quart Instant Pot. Note: Use 2 cups of water in the inner liner of an 8-quart Instant Pot.
Close and lock the lid ensuring that the Pressure Valve is in the Sealing position, select the Pressure Cook (or Manual) button and set the cooking time for 4 minutes.
When cooking time is complete, carefully turn the Pressure Valve from Sealing to Venting. When all of the pressure has been released, and the Float Valve has dropped, carefully transfer the inner liner to a heatproof surface.
Using the sling, carefully remove the bowl containing the cooked oatmeal to a heatproof surface.
Stir well and serve. Or, refrigerate for later use.