Tartar sauce since the 19th century. Tartar sauce Tartar sauce (spelled tartare sauce in the UK, New Zealand, Australia, South Africa, and other parts of the Commonwealth) is a mayonnaise of French origin, and is typically of a rough consistency due to the addition of diced gherkins or other varieties of pickles, capers and parsley. It is often used as a condiment with seafood dishes. It is most commonly used with clam strips, fried oysters, fish and chips, fish sandwiches, and fish fingers, among many other dishes. Tartar sauce is based on either mayonnaise (egg yolk, mustard or vinegar, oil) or aioli
Tomato sauce sauce is used in the same way as American ketchup. "Tomato sauce" may also be used in its generic English meaning of a sauce primarily based on tomatoes, as in a menu item "Gnocchi in a tomato sauce" where it would be understood that the sauce would be of the kind used in Italian cooking for pastas. In the U.S., "tomato sauce" refers to two distinct sauces. One is a tomato concentrate with salt and minimal herbs, used in cooking. This product is considered incomplete and not normally used as is. Related ingredients are tomato purée and tomato paste, each