Their latest addition, preserved duck eggs ... duck eggs in a mud puddle that also contained lime. Another involves ducks laying eggs in the discarded tea leaves and ashes of a stove.

Their latest addition, preserved duck eggs, is an acquired taste ... then placed into a preservative mixture—often salt, clay, lime, black tea, and ash—and are left to soak for weeks to ...

"Water-glassing eggs can be a challenging approach to achieve consistently well-preserved eggs," Dr. Bryan Quoc Le, a food scientist and food industry consultant, told Food & Wine. Le noted that ...