3-Meat Lasagna with Pancetta, Sausage, Ground Beef & Béchamel Sauce

Name: 3-Meat Lasagna with Pancetta, Sausage, Ground Beef & Béchamel Sauce
Cook time: 2 h 25 min
Total time: 2 h 25 min
Yield: 8 servings
Ingredients: 1 medium carrot; 1 stick celery; 1/2 small bunch Italian (flat-leaf) parsley; 1 medium yellow onion; 4 cloves garlic; 4 oz pancetta; 8 oz lean ground beef; 8 oz ground pork sausage; 2 cups shredded cheese, Italian blend; 1 cup Parmesan cheese, shredded; 4 cups whole milk; 1 cup heavy whipping cream; 15 no-boil lasagna noodles; 1 cup red wine (such as Cabernet Sauvignon); 2 tsp extra virgin olive oil; 1 (28 oz) can crushed tomatoes; 1/2 cup butter, unsalted; 1/2 cup all-purpose flour; 2 tbsp tomato paste; bay leaf; 2 tsp kosher salt; 1/2 tsp thyme, dried; 1/2 tsp black pepper; 1/4 tsp nutmeg, ground