Ultra Creamy Spinach and Mushroom Lasagna Recipe

Ingredients

• 8 tablespoons (1 stick) unsalted butter, plus more for greasing baking dish, divided
• 3 medium cloves garlic, minced (about 1 tablespoon)
• 2 pounds washed fresh spinach leaves, roughly chopped
• 1 pint (2 cups) heavy cream, divided
• 1/2 teaspoon freshly grated nutmeg
• Kosher salt and freshly ground black pepper
• 1 pound cottage cheese
• 1/2 cup chopped fresh parsley leaves, divided
• 1 egg
• 1 package (15 sheets) no-boil lasagna noodles
• 24 ounces button, cremini, or shiitake mushrooms, stems removed, finely chopped (see note)
• 2 medium shallots, finely chopped (about 1/2 cup)
• 2 teaspoons minced fresh thyme leaves
• 1 tablespoon soy sauce
• 2 teaspoons fresh juice from 1 lemon
• 2 tablespoons flour
• 2 cups whole milk
• 12 ounces whole milk mozzarella, grated, divided
• 2 ounces Parmiggiano-reggiano, grated

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