Ingredients

• 2 tablespoons unsalted butter
  
• 2 medium carrots, peeled and diced
  
• 1 small onion, diced
  
• 4 ounces cremini mushrooms, diced
  
• ¹/₂ celery root, peeled and diced
  
• Kosher salt
  
• Freshly ground black pepper
  
• ¹/₂ cup white vermouth
  
• 3 cups chicken stock (homemade if possible)
  
• 1 poached chicken breast, shredded
  
• 4 ounces raw foie gras (optional), diced into 1-inch cubes
  
• 1 ounce fresh black truffle
  
• A handful of all-purpose flour
  
• 1 or 2 sheets of puff pastry (each sheet will be about 8 oz)
  
• 1 egg yolk