Ketchup

Ketchup was a Human condiment used as a dressing for food.

Ketchup was one of the toppings available on Burgerland's hamburgers. 

Ketchup was also served, alongside mustard and salt and pepper, at the Pine Tree Bar and Grill in Carbon Creek in 1957. 

Background information

 * Although never mentioned, the Klingons apparently make ketchup, at least according to Penny Juday and the Star Trek: Deep Space Nine art department. Juday shows the container in the DS9 Season 1 DVD special feature "Secrets of Quark's Bar".