No one really knows where the Denver omelet originated – maybe in Denver, but maybe not. In fact, any number of food items, including Rocky Mountain oysters and big-game buffalo and elk, are claimed to have originated in the West when that might not, in fact, be the case.
Some food historians say that the Denver omelet is a variation of eggs foo young and out on the trail on cattle drives, Chinese cooks were hired to fix the tasty dish for the cowboys. The Denver omelet is sometimes known as the western omelet or the Denver sandwich.