Sift the flour, salt and sugar. Stir in the yeast. Make a well in the centre. Over a low heat, gently melt the butter in the milk. Cool, then mix with the egg and pour into the centre of the sifted dry ingredients.
Turn out the dough on to a lightly floured surface and knead for 10 minutes, until smooth and elastic. Put in a clean bowl, cover with clear film (p