German potato salad is supposed to be served warm but it isn't always. It usually has potatoes (of course), onions, bacon and then a dressing with vinegar, oil, sugar, salt, pepper and sometimes, but not always, a seasoning such as dill weed. I make it a lot. I don't care for mustard or mayo so I won't eat regular potatoe salads. I love this one....with lots of bacon! MMMM!