Place the chicken and the water in the insert of a 6 quart Instant Pot
or pressure cooker and sprinkle with the kosher salt and peppercorns. Select High Pressure and set the timer for 10 minutes. When the timer sounds, use the Natural Pressure release, and allow the valve to drop and carefully remove the lid. Remove the chicken from the Instant Pot and shred, dice, or slice. Serve hot or chill to use for later. .