Bimm mustard

Bimm mustard was a type of mustard used in Dexter Jettster's restaurant on the planet of Coruscant, Dex's Diner, before the establishment was destroyed in 19 BBY. It would be served upon request alongside any slider on the menu.

Behind the scenes
Bumm mustard is mentioned in a Star Wars Hyperspace-exclusive release, Dining at Dex's by Gregory Walker, which represents the in-universe menu of Dex's Diner. In real life, mustard is a popular condiment made from the ground seeds of mustard plants.