Wash the potatoes thoroughly. Cook in boiling water for about 20 minutes. Drain, rinse with cold water and peel, let cool off. Clean the leek, cut in half lengthwise and wash, cut into strips. Blanch the leek for about 1 minute in boiling salted water, drain, rinse with cold water and drain. Dice Gouda and turkey breast. Halve potatoes and cut into slices. Mix potatoes, leek, cheese and turkey
Season 4 tablespoons of vinegar with salt and pepper. Beat the oil in a thin stream. Mix the vinaigrette into the salad. Leave to stand for at least 30 minutes. Mix fig mustard, sour cream and mayonnaise. Stir with 2 tablespoons of vinegar and possibly some more milk to make it more liquid. Season to taste with salt and pepper. Drip salad cream over the salad and sprinkle with ground pepper. Bread tastes good with it
Waiting time approx. 45 minutes