Crack the eggs into a medium mixing bowl and gently mix with a whisk. Add all the ingredients except the onions and gently whisk together.

Heat the oil in a medium frying pan over medium-high heat. When the oil is hot, add the egg mixture and spread it around the pan until the pan is covered. Lower the heat to medium-low and then spread the diced onions evenly throughout the egg mixture. When the top surface of the egg is mostly cooked and the bottom is golden brown, use a spatula to loosen the edges of the omelette and gently fold it in half or roll it onto a plate like they did in the movie. It helps to knock the pan to shake the omelette free (a trick I learned watching Madame Mallory!).

Enjoy on its own or with bread or naan.