Lasagna Vegetarian

Bahan-bahan (12 porsi)

• 1 tablespoon olive oil
• 1 ½ cups diced zucchini (about 1 small zucchini)
• 4 ounces chopped mushrooms (about 1 cup)
• 1 ½ cups diced carrots (about 2 large carrots)
• 1 cup diced onion (about 1 small onion)
• 2 cups spinach
• 1 (28-ounce) can crushed tomatoes
• 2 (6.5-ounce) cans tomato sauce
• 1 (6-ounce) can tomato paste
• 2 tablespoons Italian seasoning
• ¼ cup granulated sugar
• 1 tablespoon chopped fresh basil
• salt (to taste)
• ground black pepper (to taste)
• 12 lasagna noodles
• 16 ounces ricotta cheese
• ½ cup grated parmesan
• 1 large egg
• 2 cups shredded mozzarella cheese