Sour cream
From Memory Alpha, the free Star Trek reference.
Sour cream is a dairy product from Earth.
When Worf and Jadzia Dax briefly called off their wedding in 2374, Julian Bashir took the opportunity to break from Kal'Hyah and order a steak with mushrooms, a baked potato, sour cream, and chives. (DS9: "You Are Cordially Invited")
