Rice and Zucchini Crostata - Lidia

Ingredients

• crostata dough (see here)
• 2 cups Arborio rice
• 4 cups shredded fancy zucchini (from about 1 pound zucchini, trimmed)
• 3 large eggs
• salt
• freshly ground black pepper
• 3 cups ricotta cheese, preferably fresh
• 2 cups chopped trimmed scallions (white and green parts)
• 1 ½ cups freshly grated Parmigiano-Reggiano cheese
• 1 ½ cups half and half
• 1 egg yolk, beaten with a few drops of water or extra virgin olive oil for the crust