An omelet is a dish made from beaten eggs that are folded around various ingredients or fried in oil or butter. It is believed that the earliest omelets were made in ancient Persia, while the French word omelette started to be used during the mid-16th century.
Nowadays, there are many omelet versions throughout the world, enriched with vegetables, cheese, meat, herbs, or seasonings. In France, the omelets are slowly cooked, unbrowned, and usually flavored with herbs, onions, and tomatoes. In Iran, there's kuku, an omelet with herbs and generous amounts of other ingredients.
In Italy, there's frittata, in Japan, tamagoyaki, in Spain there's tortilla de patatas, and in the United States there are Denver omelets and the Hangtown Fry. This egg-based dish can also be found in China, India, Indonesia, Korea, the Philippines, and Thailand.