White Christmas Lasagna | Recipe Saver

Ingredients

• 4 cups whole milk
• 15 lasagna noodles, not no-boil
• hot water, to taste
• 1 tablespoon olive oil
• 1 pound sweet or hot Italian sausage, ground or links with casings removed
• 1 medium yellow onion, diced
• 3 cloves garlic, minced
• 1 pound baby spinach
• 2 3/4 teaspoons kosher salt, divided
• 1/2 teaspoon freshly ground black pepper, divided
• 1 stick unsalted butter
• 1/2 cup all-purpose flour
• ground nutmeg, to taste
• 3/4 cup parmesan cheese, grated, divided
• 1 (15-16-ounce) container whole-milk ricotta cheese
• 1 (12-ounce) package low-moisture whole-milk or part-skim mozzarella cheese, shredded