Crumble the pumpernickel finely and roast it in a pan without fat for about 5 minutes. Select the berries, wash and drain well.
Finely puree the juice, about half of the berries, jam, vinegar and oil with a chopping stick. Stir in pumpernickel, remaining berries and orange peel. Season to taste with salt and pepper. Quantity results in approx. 300 ml or 6 portions.