Wash the potatoes and cook in boiling water for about 20 minutes. Meanwhile cook the beans in boiling salted water for about 7 minutes. Drain beans and rinse with cold water. Drain potatoes, quench and let cool down a little. Beat the stock, pesto, vinegar and oil. Season with salt, pepper and sugar.
Peel potatoes and cut into cubes. Mix the potato cubes and beans with the pesto dressing and let it stand for about 30 minutes, stirring occasionally. Wash and halve the tomatoes and stir into the salad. Arrange salad in bowls. Sprinkle with parmesan slices. Garnish with basil leaves
Waiting time approx. 45 minutes