preparation
Finely chop onion and leek and brown until soft and opaque. Add the peeled and diced potatoes, briefly fry, add salt and pepper, douse with white wine and pour vegetable or meat stock on top. Add the finely diced 'graukäse' as soon as the potato is cooked. Briefly bring all ingredients to the boil and blend with cream. Place the soup in bowls with croutons, crumbled 'graukäse' and chives and serve.