Wash the sprigs of young watercress very thoroughly and mix with a dressing made in the following way: -

Put a saltspoonful of salt and half as much pepper into a cup with a tablespoonful of salad oil. Mix thoroughly, and then add gradually two more tablespoonfuls of oil and one of vinegar, with a little onion juice if liked.

The better plan is only to rub the inside of the salad bowl with an onion or a clove of garlic; omitting the onion juice.