Francesco’s Salad Sauce. No. 2. For Six Persons. (1865.)
The yolks of 2 hard-boiled eggs put through a sieve, and the yolk of 1 raw egg, well mixed, 2 or 3 good tablespoonfuls of the very best fresh olive oil worked gently in, 1/2 teaspoonful of finely chopped onion, 1/2 teaspoonful of mustard.
When all are very well mixed, add 1 teaspoonful of Reading sauce, the same of vinegar, and a small 1/4 teacupful of cream.