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Published 2004
The concoction takes its name from the Mandarin word kē-tsiap, which refers to a fermented sauce made from soybeans. British explorers, colonists, and traders came into contact with the sauce in Southeast Asia, and upon their return to Europe they attempted to duplicate it. As soybeans were not grown in Europe, British cooks used such substitutes as anchovies, mushrooms, walnuts, and oysters. British colonists brought ketchup to North America, and Americans continued experimenting, using a variety of additional ingredients, including beans and apples.