One of the most decadent and expensive foods is caviar. I recently learned that caviar is nutty, creamy, and explodes with flavor when you bite into it. I may have to try it someday for inspiration. In modern times, the caviar of the beluga sturgeon is the rarest and most prestigious caviar in the world. Unfortunately, the reason why it is so rare and expensive is that the beluga sturgeon is on the verge of extinction from overfishing. On the upside, measures are being made to farm sturgeon caviar instead of hunting them. That way the wild sturgeon have a chance of survival and we can still enjoy their caviar.
In my fantasy series, sturgeons and their caviar will be a delicacy in one of the kingdoms of Gradaia. Imagine a reef that is teeming with hundreds or even thousands of sturgeons the size of dolphins. Then imagine a colossal bowl made from the shell of a giant clam and it is filled to the rim of caviar. That would be a dish fit for a king!