Vegetarian Lasagna | Cooking Professionally

Ingredients

• ***For the tomato sauce:***
• 3 tablespoons olive oil
• 1 small onion, diced
• 1/2 teaspoon kosher salt, plus more, to taste
• 2 cloves garlic, minced
• 1 (28-ounce) can whole peeled tomatoes
• black pepper, to taste
• ***For the lasagna:***
• 2 (10-ounce) boxes frozen chopped spinach, thawed
• 1 pound mozzarella, grated
• 2 pounds ricotta
• 1/2 cup parmesan, grated
• 1/4 teaspoon nutmeg, grated
• 2 large eggs, lightly beaten
• 2 teaspoons kosher salt
• 1/2 teaspoon black pepper
• 3 pounds sweet potatoes