Put all of the ingredients in the pressure cooking pot. Select High Pressure and a 30 minute cook time.
When the cook time ends, turn the pressure cooker off and use a natural pressure release. When the valve drops, carefully remove the lid.
Allow the stock to cool slightly. Pour the stock through a fine-mesh strainer set over a very large bowl or pot. Discard the solids.
Cover the bowl and refrigerate. When chilled, skim fat from the surface.
