For the potato and onion soup, peel and finely chop the onions and garlic. Also peel the potatoes and cut into small cubes. Heat some clarified butter in a large pot and fry the onions and garlic briefly. Add the potatoes, fry briefly and deglaze with a dash of vinegar. Slowly stir in the grated cheese and gradually pour in the soup.
Season with salt, pepper, cumin, the bay leaf and a sprig of thyme and let everything simmer for about 30 minutes until the potatoes are very soft.
Now puree the soup with a hand blender until it is creamy.
Finely chop the chives and garnish the potato and onion soup with Appenzeller.