Knead flour, fat, salt and egg yolk to a smooth dough and cover and chill for about 30 minutes. In the meantime, clean, wash and cut leek into rings. Halve the slices of pork.
Mix eggs and sour cream. Season with salt, pepper and nutmeg. Roll out the short pastry to 4 circles (approx. 14 cm Ø). Put them into moulds and press the edge firmly. Spread leek and slices of smoked pork on the shortcrust pastry.
Pour egg milk over it and bake in the preheated oven (electric cooker: 200 °C/ gas: level 3) for 25 minutes. Wash and finely chop the parsley and sprinkle over the leek quiche.