This seemingly innocuous soup contains several pitfalls and underscores the importance of understanding when a vegetable is raw, cooked and overcooked. In a classic leek and potato soup the leek must be perfectly judged. Undercooked and it will taste raw and overcooked it will smell and taste unpleasant - and loose its colour. But, in the middle, the leek has a sweet spot of colour and taste. Once you learn this the same applies to every vegetable.
Classically, leek soup is made wit