Ingredients:
- 6 Yukon gold potatoes, washed and peeled and quartered
- 6 leeks, washed and the white parts finely chopped
- 1 medium onion, peeled and quartered
- 2 quarts low-sodium chicken stock
- 1/3 cup flour
- ¾ stick unsalted butter
- 1 cup 2% milk
- 2 sprigs fresh thyme
