Soupe à l'oignon :—Slice up into thin shreds eight ounces of
onions ; blanch the slices in boiling water for five minutes ;
drain, and put them into a stew-pan, let them fry over a brisk
fire in an ounce and a half of butter till they turn pale brown ;
then add one ounce of flour, stir for two minutes, after which
add a quart of water, a saltspoonful of pepper and one of salt,
let the whole come to the boil and then simmer till the onions
are well done and serve with- croûtons of fried bread. Grated
Parmesan should accompany. This is still better if thickened
finally with raw eggs like bonne femme soup (see p. 45). Milk
can be used instead of water, or with it, half and a half.