Potato Leek Soup

OK, so I know it's almost summer (at least where I am), and I'm still making soups. However, there are two cool things about this soup. First, with some small adjustments, it can be served cold, as Vichyssoise. Second, it uses up leftover mashed potatoes in your fridge (it can also be made with raw potatoes).

Start by slicing half a leek crosswise into half moons. Transfer the pieces into a bowl of cold water. Swish them around a few times and remove with your hands to a strainer (this leaves any dirt in the bowl). Allow to drain for a minute, then put into a pan with 1 tbsp butter and half an onion, diced, and sweat until soft. At this point, add 1 clove of garlic, minced and sweat for a few more minutes until softened.

Next, add about 3 cups of mashed potatoes (the amount does not have to be exact), and water to cover the potatoes generously. Throw in a bay leaf and a pinch of thyme, if you have them. Simmer for a while (at least 20 minutes) to allow the flavors to meld. Remove the bay leaf. Blend the soup (take care, especially if using a stand blender, to avoid spraying hot food everywhere - small batches are best). Add up to 1/2 cup cream (you decide how creamy you want it), and some more water if it seems too thick (depending on your preference). Bring back to a simmer, season (and taste and adjust) and serve. You could garnish the soup with chives and/or any kind of salty pork product - bacon, prosciutto, pancetta etc. Enjoy!

Note 1 - To make vichyssoise (cold potato leek soup), you will need to thin the soup more (with cream and/or water), strain through a fine strainer and chill it in the refrigerator. Once cold, check the consistency (it should be like whipping (single) cream) and the seasoning, and adjust as necessary.

Note 2 - If you have no mashed potatoes, substitute peeled, cubed raw potatoes. About 2 cups would probably work, but again, quantities are not that important. Simmer a little longer - at least 30 minutes, and make sure that the potatoes are fully cooked before blending. You will need more water too.

Note 3 - Metric info: 3 cups = about 700 ml; 1/2 cup = 120 ml; 2 cups = 480 ml.