World's Best Lasagna

Ingredients

• 1 tablespoon olive oil
• 1 onion, finely chopped
• 4 cloves garlic, minced
• 1 pound (450g) ground beef
• 1 pound (450g) ground pork
• 1 can (28 oz) crushed tomatoes
• 2 tablespoons tomato paste
• 1 teaspoon dried oregano
• 1 teaspoon dried basil
• 1/2 teaspoon red pepper flakes (optional)
• Salt and pepper to taste
• 15 oz (425g) ricotta cheese
• 1 large egg
• 1/2 cup grated Parmesan cheese
• 2 cups (8 oz) shredded mozzarella cheese
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1/4 cup fresh parsley, chopped (optional)
• 12 lasagna noodles (preferably no-cook or oven-ready)
• 2 cups (8 oz) shredded mozzarella cheese (for topping)
• 1/2 cup grated Parmesan cheese (for topping)