Wash the potatoes well and cook for about 40 minutes. Mix lemon juice, salt, pepper and some sugar. Beat the oil well into the mixture
Sort the sprouts, wash and drain. Shrimps rinse and drain. Wash cucumber, peel if necessary. First cut into slices, then into strips. Wash tomato, quarter it and remove seeds if necessary. Finely dice the flesh. Mix everything with the marinade
Mix yoghurt and crème fraîche, season to taste. Drain the potatoes, cut them crosswise, break open a little and arrange them on top with the sprout mix and dip. Garnish with salad, lemon and dill