This is sort of the chef equivalent of fizzbuzz or "reverse a binary tree" - there's no gimmicks, something "everyone" should know how to do, it's nothing fancy, just the basics of "can you iterate over data structures and write for loops competently" - or in this case "can you not under/over cook the eggs and can you deliver them in the style you say you're going to.

The egg omelet is a classic for testing French chefs. It is much less about the ingredients (quality, etc), and much more about pure skill to cook it perfectly.

What would be the equivalent for a technical interview? Perhaps: Implement a generic linked list or dynamic array.