Ingredients

• 70 grams butter, plus extra for greasing the pan
  
• 50 grams flour
  
• 1.25 liters milk
  
• 1 pinch nutmeg
  
• 500 grams macaroni, penne, or rigatoni
  
• 75 grams Parmigiano-Reggiano cheese, finely grated
  
• 225 grams a mixture of 3 medium soft cheeses such as Swiss cheese, gruyere, fontina, primosale, provolone, caciocavallo, etc., cut into 1 cm cubes
  
• 40 grams breadcrumbs
  
• sea salt
  
• Freshly ground black pepper