Classic Lasagna - Chef's Mandala

Ingredients

• 16 8-inch sheets lasagna Fresh or boxed
• 4 Tbsp butter (salted)
• 1/4 cup flour (all-purpose)
• 1 1/2 cup milk (cow)
• 1/2 tsp salt (kosher)
• 1/8 tsp nutmeg
• 2 oz pancetta (belly meat bacon)
• 2 Tbsp olive oil (extra virgin)
• 1/2 onion (yellow) minced
• 1 lb carrot minced
• 1 celery stalk, minced
• 2 garlic (cloves) minced
• 1/4 lb ground pork
• 1/4 lb ground beef
• 1 tsp salt (kosher)
• 1/2 tsp black pepper (fine)
• 1/2 cup wine (white & dry)
• 15 cup tomato (puree)
• 1 1/2 cup chicken stock
• 3/4 cup milk (cow)
• 1 1/2 cup grated parmesan reggiano cheese