Crumb toppings normally appear on fruit desserts, but a savory mixture of grated pecorino and toasted walnuts works in much the same way, adding textural contrast to delicate fettuccine and grilled zucchini. Garlic-chile oil jazzes up the flavor.
Cooks' note:
Zucchini can be cooked in a hot 2-burner grill pan, 8 to 10 minutes total.