Bought some leeks and then I thought, "What now?" Here's what happened and now it's a staple item here. If you hate celery, leave it in large sections that you can fish out later.
Clean the sliced leeks by letting them float in a bowl of water for a few minutes and letting any dirt or grit fall to the bottom.
Put all the ingredients EXCEPT the barley into a large pot and simmer.
Once the leeks and celery have become translucent and soft (approximately 40 mins.), add the barley stirring occasionally until tender (approximately 45 mins.).