Chop the onions, carrots, celery, leeks, and garlic.
Be sure to quarter the leeks length-ways, then dice.
Fry up all the veggies in oil for about 10 minutes.
Peel the potatoes and cut into 1cm cubes.
Make stock using about 1.5 litres of water, and add to vegetables.
Then add potatoes and bring to the boil. Simmer for 10 minutes with the lid on, and season to
taste.