Peel and finely dice the onion and garlic. Peel, wash and chop the potatoes and carrots. Heat the fat in a saucepan. Sauté onion and garlic in it. Add potatoes and carrots and steam briefly
Wash the thyme and add 1 l water and broth. Bring everything to the boil, cover and simmer for about 20 minutes
Take out approx. 4 tablespoons of vegetable cubes and set aside. Remove thyme stalks. Puree the soup finely. Stir in half the crème fraiche. Season to taste with salt, pepper and Worcester sauce. Serve the soup. Spread the rest of the crème fraîche and vegetable cubes on top. Garnish with thyme