A quetzi ramekin was a type of food served in a ramekin.
It was reputed to an aphrodisiac. When Tasha Yar seduced Data under the influence of polywater intoxication in 2364, she had a meal of Aldebaran wine, oysters, and quetzi ramekins—all aphrodisiacs. When the two later went on a mission to Treva, Data programmed the replicator with these foods, thinking them to be simply foods she liked. (TNG novel: Survivors)
The following year, Data repeated the meal when he suggested Aldebaran wine and quetzi ramekins in addition to oysters when he dined with Pris Shenkley. (TNG novel: Metamorphosis)