The word flan derived from the Latin name (flado) meaning flat cake. Flan dates back as far as ancient Rome when the Romans kept domesticated chickens used for laying ended up with large surplus of eggs . They looked to the Greeks for their great culinary skills, and developed many recipes using eggs in their make up, one of which is the flan. Originally it was created as a savory dish .
The flan survived the fall of the Roman Empire and reemerged as a sweet tasting flan !