Here in the kitchen we have an automated dosing system. Ketchup is made up of five ingredients: brine, vinegar, sugar, tomato paste, and the secret spices. The process is mainly about heating the ...

Ketchup—that cheerful red sauce sold in handy glass bottles—first came on the American market in the 19th century. But its ingredients were shockingly different than they are today.

To make the ketchup, add all the ingredients to the smallest pan possible, add water to cover and bring to a simmer. Once the squash is tender, drain off two inches of liquid and blend smooth with ...