Lasagne Bolognese

INGREDIENTS

• 4 ounces pancetta (Italian bacon), finely chopped
• 2 cups finely grated Parmesan
• 1 cup dry white wine
• 1/2 teaspoons kosher salt
• 2 tablespoons olive oil
• 3 cups low-sodium chicken broth, divided
• 1 large onion, coarsely chopped
• 1 pound ground beef chuck
• 1 medium carrot, peeled, coarsely chopped
• 1/4 cup all-purpose flour
• 1 cup whole milk
• 5 tablespoons unsalted butter
• Kosher salt, freshly ground pepper
• 4 cups whole milk, warmed
• 3 cups all-purpose flour, plus more
• 1 pound ground pork
• Kosher salt
• Unsalted butter, room temperature (for dish)
• 4 large eggs, room temperature
• 1 celery stalk, coarsely chopped
• 1 14.5-ounce can crushed tomatoes
• Pinch of freshly ground nutmeg