Wash the potatoes and cook for 20-25 minutes until soft. Peel and finely chop the onion. Drain the potatoes and rinse briefly in cold water. First peel, then cut into slices. Simmer broth, mustard, vinegar, diced onion and 3 tablespoons of oil for 1-2 minutes, then pour over the potatoes. Season with salt and pepper and leave to stand for 1-2 hours.
Cut the meatloaf into cubes. Heat 1 tablespoon of oil in a frying pan and fry the cubes for about 2 minutes, then add to the potato salad. Wash and clean the cucumber and slice it thinly. Wash chives, shake dry and cut into thin rings. Add chives and cucumber slices to the salad before serving and season again. Garnish with chives
1 hour waiting time