Wash potatoes thoroughly and cook in boiling water for about 20 minutes. Drain potatoes, rinse with cold water and peel. Let the potatoes cool down. Mix pesto and vinegar, season to taste with salt, pepper and sugar.
Clean and wash the salad and pluck the leaves. Clean, wash and slice spring onions. Wash, clean and slice the tomatoes. Halve or slice the potatoes.
Drain the olives well. Mix potatoes, tomatoes, spring onions, lettuce, olives and salami slices. Pour pesto dressing over it and fold in. Arrange on plates.