Cook the potatoes in boiling water for about 20 minutes. For the tuna cream, put tuna in a sieve and drain. Drain and chop the capers. Mix tuna, capers, sour cream and salad cream well with a fork. Season with pepper. Spread the cream on the turkey breast slices, roll up the slices
For the potato dressing, peel and finely dice the onion. Wash the chives, shake dry and cut into fine rolls. Drain the potatoes and rinse with cold water. Peel the potatoes and mash them with a fork. Mix vinegar, salt, pepper and sugar. Add oil drop by drop. Stir in 4 tablespoons of water, potatoes, onion and chives.
Clean, wash and halve the tomatoes. Wash, clean and slice the cucumber. Mix the tomatoes and cucumber with the dressing in a bowl. Clean, wash and shake the lettuce dry and pluck into bite-sized pieces. Arrange prepared salad ingredients with the rolls