Hi, I slice equal parts of leeks and onions...saute in butter until transparent..add sliced raw potatoes and cover with chicken broth until the potatoes are cooked... use a hand blender and pulse it until you get the consistancy you want..add half and half. This is a thick soup..if you want it thinner..when cooking the mixture cover the potatoes with more chicken broth... this is my version of the French vichysoisse. I serve it hot with sprinkled chives.