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Catch up on ketchup’s history with a recipe for cucumber ketchup · OutLook by the Bay
While tomato ketchup certainly reigns supreme as a beloved American condiment, in the past ketchup was made from a surprising number of ingredients other than tomatoes, including mushrooms, walnuts, berries, wine, rum, kidney beans, liver, seafood, and numerous fruits and vegetables, even cucumbers.
Joyce M. White