Wash the potatoes and cook in plenty of boiling water for about 20 minutes. In the meantime, clean and wash the peppers and cut them into large lozenges. Cut olives in half. Peel onion and chop finely.
Wash the basil and thyme and dab dry. Strip and chop the thyme leaves from the stalks. Cut basil into fine strips, except for a little bit for garnishing. Mix vinegar, onion cubes, salt and pepper, add oil.
Pour the potatoes onto a sieve, rinse with cold water and remove the skin. Cut the potatoes into slices. Heat the stock in a pot and cover the pepper pieces and stew them for 3-4 minutes.
Add the potatoes, vinaigrette, olives and herbs and leave to cool. Season salad with salt and pepper again just before serving and arrange on a plate. Sprinkle with pink berries and serve garnished with basil.