Preparation Cook the potatoes in their skins with the dill; peel and dice them and marinate them while still hot in the French dressing. Add the onion and let stand until cold - at least an hour - while you prepare the rest of the ingredients. Combine potato-onion mixture with remaining ingredients, including mayonnaise blended with sour cream. Season with salt and pepper to taste.
Preparation Cook the potatoes in their skins with the dill; peel and dice them and marinate them while still hot in the French dressing. Add the onion and let stand until cold - at least an hour - while you prepare the rest of the ingredients. Combine potato-onion mixture with remaining ingredients, including mayonnaise blended with sour cream. Season with salt and pepper to taste.