This traditional dish, sometimes called Italian wedding soup, successfully marries the flavors of meats and greens. The spoon-size turkey meatballs in this version make it a real kid-pleaser and hearty enough to be a satisfying supper.
In a large bowl, mix the ground turkey, water, egg, onion, bread crumbs, cheese, salt, and pepper to taste. Shape the mixture into 1-inch balls.
In a large pot, combine the broth and carrots and bring them to a simmer. Add the orzo and let it cook for 5 minutes (pastina takes 2 minutes), stirring frequently.
Add the meatballs and simmer them in the broth for 10 minutes. Then stir in the spinach and simmer it until it's wilted, about 1 minute. Serves 6 to 8.