Peel the potatoes and together Wash with zucchini and cut into cubes with kale knife. Potatoes are boiled and once tender, add the courgettes. Onion cut into slices in a deep bowl. Finished potatoes and zucchini carefully drain and put in the onions. Salad mix with olive oil and mayonnaise. Add a pinch of white pepper and dill, finely chopped. Serve well chilled.