Baked Zucchini Ziti Spirals with Mozzarella recipes

Name: Baked Zucchini Ziti Spirals with Mozzarella recipes
Ingredients: 5 zucchini, ends trimmed; 1 tablespoon extra-virgin olive oil; ½ sweet onion, minced; 2 garlic cloves, minced; 1½ cups ricotta cheese; 1 cup grated mozzarella cheese; 1 teaspoon dried oregano; ¼ teaspoon red pepper flakes, or more to taste; salt; freshly ground black pepper; 2 cups marinara sauce; ⅓ cup grated Parmesan cheese; basil