Wash the potatoes thoroughly and boil them in salted water for about 20 minutes. Drain, rinse and peel. Pour hot broth over the potatoes and let them simmer for about 30 minutes. In the meantime peel the onion and cut it into thin slices. Clean, wash and halve the tomatoes. Clean, wash and cut the zucchini into thin slices. Wash basil and sage, dab dry, pluck leaves from the stems and cut into strips.
Wash thyme, dab dry and pluck the leaves from the stalks. Peel garlic and chop finely. Mix vinegar, salt, pepper and sugar. Add herbs and garlic and beat oil into it. Mix potatoes, tomatoes, onion, zucchini and olives. Pour the vinaigrette over it and let it soak well. Arrange the salad in a bowl and serve garnished with basil and sage as desired