Lay on a dish some sliced tomatoes, taking out the seeds, and sprinkle them over with picked shrimps. Then pour over all a good mayonnaise sauce. For the sauce: Take the yolk of an egg and mix it with two soup-spoonfuls of salad oil that you must pass in very gently and very little at a time. Melt a good pinch of salt in a teaspoonful of vinegar (tarragon vinegar, if you have it); add pepper and a small quantity of made mustard. In making this sauce be sure to stir it always the same way. It will take about half-an-hour to make it properly.

[Paquerette.]