Wash the leeks thoroughly and slice them. The white and pale green parts only
Add the oil, onion, garlic, leeks, thyme and bay leaf to a pot. Allow the vegetable to sweat on low heat for about 15 minutes
Add the potatoes and allow it to cook for a further 2 minutes
Add the vegetable stock and water. Cover and allow the soup to simmer until the potatoes are soft and tender
Remove the bay leaf and thyme sprigs. Use a stick blender and blend the soup until smooth. Return to the heat and add the fresh cream. Season with more salt and pepper if required
Serve with a sprinkle of chives if desired
Notes
You can reduce the amount of water depending on how thick you prefer your soup
I added fresh cream for a rich and creamy soup, however you can leave out the cream if you prefer
The salt from the stock may be enough so go easy when adding salt
The leeks I used was really large and when sliced I got about 1&1/2 cups of leek