You can add any extra vegetables you like to the stock, such as leeks, fennel…. Up to you.
The eggs should be at room temperature.
After you’ve added the beaten egg to the soup be careful if you need to reheat it, don’t allow it to boil as the eggs may separate.
You might like to add stock cubes for extra flavour.
Note: The addition of cornflour is optional. It helps to stabilize the soup and stop the eggs from separating.