Stuffed Shells With Arrabbiata Sauce

Name: Stuffed Shells With Arrabbiata Sauce
Cuisine: European, Italian, Mediterranean
Ingredients: 12 ounces jumbo pasta shells, or 1 pound Lumaconi; 2 tablespoons olive oil, plus extra for greasing baking sheet; 4 Cups Arrabbiata Sauce, such as Bio Orto; 2 (15-ounce) containers whole milk ricotta cheese; 6 ounces thinly sliced pancetta, diced; 1 1/3 cups grated Parmesan; 4 large egg yolks; 3 tablespoons chopped fresh Italian parsley leaves; 1 teasapoon dried oregano; 1 1/2 teaspoons salt; 1/2 teaspoon freshly ground black pepper; 1 cup shredded mozzarella cheese