Sedanini with Zucchini and Pistachio Pesto

Zucchini and pistachios seem to enjoy a natural affinity. Maybe because both are mild but also distinctly nutty and sweet. And green. In any case, the moment I opened the little jar of pistachio pesto sitting on my kitchen shelf and peered into its mossy depths, I knew I wanted to use it for a zucchini dish.

The dish I had in mind was one that my friend …