Bagshot Salad Sauce. (R. M. Beverley. 1861.)
Take the hard-boiled volks of 2 fresh eggs, (cooked the day before for 20 minutes,) and beat them smooth in a mortar, with 3 young onions, or a teaspoonful of chopped old onion, raw, to flavour the eggs.
Next work in a small saltspoonful of salt, then about 1/2 teaspoonful of English (made) table mustard. Beat again. Add a tablespoonful of English vinegar very gradually, then 2 large tablespoonfuls of very fresh sweet olive oil; mixing the sauce well, in a mortar with a spoon, between each ingredient through-out this recipe. If the vinegar be not very sharp, add a table-spoonful more of vinegar, and mix again. Next add a table-spoonful of cream, then 1/2 teaspoonful of Tarragon vinegar and a second tablespoonful of cream. Lastly, add a tablespoonful mushroom catsup or a teaspoonful of Reading sauce, or even less of Worcestershire sauce, which is less mild.
1 teaspoonful of vinegar is generally enough. If you have no cream, then use 3 spoonfuls of oil. Some prefer no tarragon vinegar.
Cut the lettuce lengthways, not across, and mix well before serving.
The above is called a “rare salad sauce.”