Zucchini Rollatini

Name: Zucchini Rollatini
Ingredients: 2 tablespoons olive oil; 1/2 small yellow onion, finely chopped; Kosher salt and freshly ground black pepper; 1/2 teaspoon dried oregano; 3 cloves garlic, finely grated; One 28-ounce can whole peeled tomatoes, crushed by hand; 1/8 teaspoon crushed red pepper flakes; 1 large zucchini (about 1 pound), ends trimmed; 1 cup whole-milk ricotta; 1/2 cup fresh basil, finely chopped; 1/4 cup fresh parsley, finely chopped; 1 teaspoon grated lemon zest; 1 large egg, beaten; 1 cup shredded whole-milk mozzarella (about 4 ounces); 1/2 cup plus 1 tablespoon grated Parmigiano-Reggiano (about 2 1/2 ounces)