Easy Spinach Lasagna

Bahan-bahan (8 porsi)

• 9 lasagna noodles
• 1 tablespoon olive oil
• 1 large onion (chopped)
• 3 cloves garlic (minced)
• 4 cups pasta sauce
• 2 teaspoons Italian seasoning
• 10 ounces frozen chopped spinach (thawed)
• 15 ounces ricotta cheese
• 4 cups shredded mozzarella cheese (divided)
• ½ cup shredded Parmesan cheese (divided)
• 1 egg
• 1 tablespoon chopped fresh parsley
• ½ teaspoon salt