It's the perfect soup to make with fresh leeks offered at a discount in September and October.

Select "sauté" and put 10 minutes on medium. As soon as the pot is hot, cook the leek and onion for 5 minutes, stirring constantly with a wooden spoon. Press "cancel".
Add the broth, celery, potatoes, parsley and nutmeg. Secure the lid with the steam release valve in the pressure position. Select "soup, pressure or manual", set 15 minutes to "high" with "keep warm to off". Press "start".
At the sound of the end of cooking alarm, press "cancel" and let the pressure release naturally until the float valve (the metal pin) is lowered.
Remove the lid and puree the soup with a blender. Return the soup to the inner pot, stir in the cream add salt and pepper to taste and cook 5 minutes at "sauté-low or less", stirring constantly without waiting for the appliance to reach its temperature. Adjust the seasoning if necessary.