Clean the cauliflower, cut into large florets, wash and cook in salted boiling water for 15-20 minutes.
Melt the fat in a saucepan, stir in the flour and sweat. Fill up with 1/4 l of the cooking water, stock and cream and cook for about 10 minutes while stirring.
Season well with mustard, salt, pepper and sugar. egg yolk
Mix and stir into the sauce.
Pour the sauce over the cauliflower florets, cut the chives into rolls and sprinkle over them.
It goes well with grilled sausages and boiled potatoes.