Heat oven to 200C/180C fan/gas 6.
Melt all the butter in a saucepan. Brush
a 20cm soufflé dish with a little of it,
then dust with flour. In the saucepan,
stir the flour into the rest of the melted
butter, then sizzle everything for 1 min.
Gradually pour in the milk to make a
white sauce, then add two-thirds of
the cheese and carry on cooking to
melt. Leave to cool slightly, then mix
in the remaining cheese, the cream
or crème fraîche and the egg yolks.
Season, then add the nutmeg and