This is an adopted recipe. Here's what the original poster had to say about this recipe: "This is the way Bavarians eat their potato salad. You can replace 1/3 of the potatoes with thinly sliced cucumbers and add them just before serving,or use field salad or endive lettuce instead. A Bavarian potato salad always has a slight sweet and sour taste. Also very important: do not leave out the butter, it changes the taste significantly. Serve it warm or at room temperature."