Taspar eggs were eggs that originated from the Cardassian creature called a taspar. Taspar eggs could be eaten boiled or raw. Most Cardassians were revolted by the sight of live taspar; it had a brownish color and a gelatinous consistency.
As a starving homeless child, Madred scavenged for and ate raw taspar eggs straight from the shell.
Several years later, in 2369, Gul Madred served a raw taspar egg in a similar manner to a captive Captain Jean-Luc Picard in an effort to degrade him. Picard, however, refused to give in to Madred, and ate the Taspar raw, much to Madred's amusement. (TNG: "Chain of Command, Part II")