Clean and wash the leek and cut it diagonally into rings. Clean and quarter the mushrooms. Knead minced meat, egg and breadcrumbs, season with salt and pepper and roll into about 20 small balls. Heat the oil in a pot. Fry the meatballs for about 5 minutes and take them out.
Sauté the mushrooms in the cooking oil, add the leek and deglaze with vegetable stock. Let simmer for about 10 minutes. Stir cream cheese with some vegetable stock until smooth and stir into the soup. Add meatballs, let simmer again for about 5 minutes, season with salt and pepper
Meanwhile, wash the chives, shake them dry and, except for 4 stalks for garnishing, cut them into fine rings. Toast the toast and cut into small cubes. Pour soup into small bowls and sprinkle with chives rings. Halve the chives lengthwise and garnish with them. Add diced toast bread