My local library has an interesting book called "Pure Ketchup" that covers all this and more. Among things that Gladwell didn't talk about is that before tomat

My local library has an interesting book called "Pure Ketchup" that covers all this and more. Among things that Gladwell didn't talk about is that before tomato ketchup became standard there were dozens of totally different savory sauces called ketchups. From the number of recipes in the list in the back of the book, anchovy ketchup was one of the most popular. One that actually looked good enough that I tried making it was grape ketchup - sort of a runnier, not as sweet grape jam - it is good on turkey instead of cranberry sauce. Judging from the list, our ancestors made ketchup out of nearly anything they could get a hold of.