Instructions: In a large bowl, mix the chicken livers, egg yolks, olive oil, bread crumbs, and cheese and season with salt and pepper. Divide the mixture into 2 equal portions. Using 1 portion, stuff the hollowed-out canals of the zucchini halves. Set aside.

In a large, heavy-bottomed skillet, heat the butter over medium heat. Add the chopped zucchini flesh, carrot and celery and cook, stirring occasionally, over medium heat until the vegetables are softened and slightly browned, about 8 to 9 minutes. Season with salt and pepper and add the remaining chicken livers-bread crumb mixture. Add the milk and cook, covered, 10 minutes.

Stir in the tomatoes, season with salt and pepper and bring to a boil. Reduce to a simmer, carefully place the zucchini halves in the sauce and cook, covered, 1 hour over medium-low heat. Arrange 2 zucchini halves and some of the sauce on each plate, topping with more Parmigiano-Reggiano, if desired, and serve immediately.

This recipe yields 6 servings.

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