Following the manufacturer's instructions, release the pressure using the cooker's release device, or cool the cooker by running cold water over the lid for 30 seconds. Open carefully, remove the lid, and add the vegetables, herbs, salt, and pepper. Put the lid back on the pressure cooker and heat to full pressure over high heat. Reduce the heat to maintain pressure and cook another 10 minutes. Release the pressure, remove the lid, and cool for 5 minutes. Serve with vinegar.