Lasagna Bolognese

Zutaten

• Bolognese Sauce
• 1 large onion
• coarsely chopped
• 1 medium carrot
• peeled
• coarsely chopped 1 celery stalk
• coarsely chopped
• 2 tablespoons olive oil
• 1 pound ground beef chuck
• 1 pound ground pork
• 4 oz. pancetta (Italian bacon)
• finely chopped Kosher salt and freshly ground black pepper 1 cup dry white
• 1 cup whole milk
• 1 14.5 oz. can crushed tomatoes
• 3 cups low-sodium chicken broth
• divided
• Lasagnenudeln
• Béchamel
• 5 tablespoons unsalted butter 1⁄4 cup all-purpose flour
• 4 cups whole milk
• warmed pinch of freshly ground nutmeg Kosher salt
• Assembly
• Kosher salt
• Unsalted butter
• room temperature (for dish) 2 cups finely grated Parmesan