Creamy Stuffed Manicotti: Family-Favorite Comfort Food

Ingredients

• 2 tablespoons olive oil (30 ml)
• 1 medium onion, chopped (approx. 1 cup)
• 2 cloves garlic, minced
• 1 (28 ounce/794g) can crushed tomatoes
• 1 (15 ounce/425g) can tomato sauce
• 1 teaspoon dried oregano
• 1/2 teaspoon dried basil
• 1/4 teaspoon red pepper flakes (optional)
• Salt and freshly ground black pepper, to taste
• 1 teaspoon granulated sugar
• 1 (15 ounce/425g) container ricotta cheese, full-fat
• 1/2 cup grated Parmesan cheese, plus more for topping
• 1 large egg, lightly beaten
• 1 (10 ounce/283g) package frozen spinach, thawed and squeezed dry
• 1/4 cup chopped fresh parsley
• 1/4 teaspoon ground nutmeg
• 12 dried manicotti shells
• 1 cup shredded mozzarella cheese