Classic Italian Lasagna with Rich Meat Sauce and Creamy Béchamel - Mr. Cook

Ingredients

• 12 lasagna noodles
• 1 pound ground beef
• 1 pound ground pork
• 1 onion, chopped
• 2 cloves garlic, minced
• 1 can (28 ounces) crushed tomatoes
• 2 tablespoons tomato paste
• 1 teaspoon dried oregano
• 1 teaspoon dried basil
• ½ teaspoon red pepper flakes
• Salt to taste
• Pepper to taste
• 2 cups ricotta cheese
• 1 egg
• 2 cups shredded mozzarella cheese
• 1 cup grated Parmesan cheese
• 4 tablespoons unsalted butter
• 4 tablespoons all-purpose flour
• 2 cups whole milk
• ¼ teaspoon nutmeg