
Pepper vinegar
Mary Randolph's pepper vinegar: ripe pepper pods simmered in vinegar until the liquid is reduced to one quart, then strained for use in gravies and catsups. From The Virginia Housewife.
Tomato soy, The Virginia Housewife
Mary Randolph's tomato soy, a tomato condiment and not soybean sauce: tomatoes salted in layers for three days, boiled for a day, passed through a sieve and spiced with cloves, allspice, black pepper and cayenne.

Tomato soy is a thick, spiced tomato condiment made in quantity. Randolph's version starts from a bushel of tomatoes, which is far larger than a household batch today, and it is cooked for most of two days. The name has nothing to do with soybeans. The catalogue that supplied this topic makes the same point.
The finished liquid is poured into bottles and kept. It is closer to a long-cooked tomato sauce with strong spice than to a table ketchup, and the source gives it as one of several preparations for keeping tomatoes through the season.
The tomatoes are sliced without skinning and layered in a tub with salt and sliced onions. After three days they go into a large iron pot and boil from early morning until night, stirred constantly. The mixture is then sieved, and the liquor is returned to the pot with the spices.
Boiling the spiced liquor slowly through a second day reduces it. The liquid is cooled, bottled and corked. Randolph writes that it keeps well when boiled slowly and sufficiently, and that a batch which ferments must be boiled again.
Randolph gives tomato soy next to tomato catsup, pepper vinegar and mushroom catsup in the pickles and catsups part of the book. Read together, these recipes show a Virginia kitchen making tomato and pepper condiments before bottled ketchup became common.
The recipe is evidence for the book's own method. It is not a record of a single origin.
Randolph writes that tomato soy will keep for many years if it is boiled slowly and enough, and it gives a reboil instruction for a batch that ferments. Those are the book's statements. The page does not test them, and it gives no acidity figure, shelf life or safety check.
Do not follow the storage advice as a modern preservation method. The large batch size and the long boil are part of the historical record, not guidance for a home kitchen.
Randolph's tomato soy is one of the tomato condiments in The Virginia Housewife, listed in the pickles and catsups section beside pepper vinegar and mushroom catsup. The consulted text is the 1860 edition on Project Gutenberg. The first edition was printed earlier; the text here is not compared with it. The name is a tomato condiment, not soybean sauce.
Recipe in a Virginia household book; it attests the recipe in that book, not an origin.
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Project GutenbergMethod · History
The Virginia Housewife; Or, Methodical CookTomato soy: a bushel of ripe tomatoes sliced and salted in layers with half a pint of salt and three sliced onions per layer, left three days, boiled a day, sieved, spiced with an ounce of cloves, a quarter pound each of allspice and whole black pepper and a small wine glass of cayenne, bottled after a day's cooling; reboil if it ferments.
Cited in: Overview; Method in the source; Place in the book; Storage and limits