Ina Gartens Mushroom Lasagna Is the Comforting Dinner I Keep Coming Back To

Name: Ina Garten’s Mushroom Lasagna Is the Comforting Dinner I Keep Coming Back To
Ingredients: Kosher salt; Good olive oil; 3/4 pound dried lasagna noodles; 4 cups whole milk; 12 tablespoons unsalted butter, divided (1 1/2 sticks); 1/2 cup all-purpose flour; 1 teaspoon freshly ground black pepper; 1 teaspoon ground nutmeg; 1 1/2 pounds portobello mushrooms; 1 cup freshly grated Parmesan cheese