Ingredients

• 3 ¹/₂ ounces (100 grams) fine bread crumbs
  
• 2 tablespoons (20 grams) butter
  
• ¹/₂ cup (40 grams) Parmesan cheese, grated (plus more for serving)
  
• 2 eggs
  
• Freshly grated nutmeg or lemon zest, if desired
  
• 2 quarts (2 litres) chicken stock (homemade is best)