Clean the leek, wash thoroughly and cut into rings. Peel onion and garlic and chop finely.
Coarsely chop the walnuts and roast them in a large pan without fat. Remove. Heat the oil in the pan. Fry the chopped walnuts in it until crumbly. Season with salt and pepper.
Add leek, onion and garlic and fry for 2-3 minutes. Dust with flour and sauté briefly. Add 300 ml water and cream, bring to the boil and cook for 5-8 minutes. Season with salt, pepper, nutmeg and some sugar.
Mix in the nuts. Arrange the leek mince pan. Grey bread tastes good with it.