How to Make Lasagna: My Family's Easy Italian Classic

Ingredients

• 1 tablespoon olive oil
• 1 large onion, chopped
• 2 cloves garlic, minced
• 1 pound ground beef
• 1/2 pound Italian sausage, removed from casing
• 1 (28 ounce) can crushed tomatoes
• 1 (15 ounce) can tomato sauce
• 1 (6 ounce) can tomato paste
• 1 teaspoon dried oregano
• 1 teaspoon dried basil
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1/4 cup chopped fresh parsley (optional)
• 15 ounces ricotta cheese
• 1 large egg, beaten
• 1/4 cup grated Parmesan cheese
• 1/4 teaspoon salt
• 1/8 teaspoon nutmeg
• 9 lasagna noodles, cooked according to package directions
• 3 cups shredded mozzarella cheese