An omelette is a seemingly simple dish but most chefs will assure you that it takes a bit of skill to cook properly. In Britain, an omelette is best known as a breakfast staple but it can easily be elevated to a main course with the addition of a couple of ingredients. For example, potatoes can transform a humble breakfast omelette into a glorious Spanish omelette. Likewise, an Omelette Arnold Bennett uses hollandaise and smoked haddock to turn the dish into a luxurious supper.