This needs more filling than a classic French omelette. The following recipe is an example of what you can do but there are endless possible variations. Use fresh-cooked ingredients or leftover foods such as sliced potato, peas, cauliflower, spinach and ham.
To make the filling, fry the potatoes in half the oil in a heavy-based frying pan, turning until well browned, then remove. Fry the onions and pepper in the remaining oil for 5–7 minutes until softened, then cool a little. Beat