The potato omelette is a whole world and even has a World Day: March 9. The tricks to do it depend on the final result sought. Many ingredients come into the debate about the ideal potato omelette, in addition to onion, which is the most controversial. It is also discussed whether to add a few cloves of garlic or not. If it should be honeyed, like a tortilla coulant, when cut with the knife or, on the contrary, it should be well cooked, like a sponge cake. We tell you 8 tricks to make a concrete one: with onion and very sweet.