First peel the onions and potatoes. Clean the leeks and celery.
Roughly chop the potatoes, onions, leeks and celery and sauté briefly with butter in a pot.
Add the soup and simmer on low heat for 45 minutes.
Cut the bacon into small cubes, fry in a pan until crispy and skim.
Finely puree the potato soup with a blender, season with sea salt and nutmeg and refine with the cream.
Spread the crispy bacon and the chives over the cream of potato soup and serve the soup immediately.