Authentic German Summer Potato Salad (Leichter Kartoffelsalat) - cooking recipe

Ingredients

6 medium boiling potatoes (unpeeled)
1 cup finely chopped onion
2/3 cup chicken stock
1/3 cup olive oil
1 tablespoon white wine vinegar
2 teaspoons hot mustard
2 teaspoons salt
1 teaspoon fresh ground black pepper
1 tablespoon fresh lemon juice

Preparation

Drop the potatoes into enough boiling water to cover. Boil until they show just the slightest resistance when pieces with the point of a sharp knife. Dont overcook.
Drain in a coloander, then peel and cut into 1/4 inch slices. Set aside in a bowl covered in foil.
In a 2 - 3 quart saucepan, combine all the ingredients except lemon juice. Bring to a boil stirring occasionally. Reduce the heat to low and simmer for 5 minutes. Remove from heat and stir in lemon juice.
Pour the sauce over the potato slices, turning to coat evenly. Let cool to room temperature then taste for seasoning and serve.