Bring a large saucepan of lightly salted water to the boil, put in the potatoes and boil for 7 minutes. Add the spaghetti and boil for 8 minutes, then add the beans, broken into pieces if you wish, and boil for 4–5 minutes. By this time, each ingredient should be perfectly cooked. Drain and put in a heated serving bowl containing the oil. Turn in the oil, and then add the pesto. Serve immediately, with the Parmesan sprinkled over.
© 1995 Frances Bissell. All rights reserved.