Mayonnaise

Mayonnaise was a type of food largely unknown to Toril.

"Have you such a thing about as the makings of a sandwich? In this world, once, I was introduced to something called "mayo" that almost made up for the horribly transformed material they tried to pass off as meat in the same sandwich."

- Mordenkainen

History
Following the Second Sundering, alchemy jugs were found to be able to produce mayonnaise.