• 

  Gruyère cheese (可选的) cut into pieces

  60 g

Pastry

• 

  butter, unsalted to grease
• 

  all purpose white flour to dust
• 

  all purpose white flour

  170 g
• 

  butter, unsalted cold and cut into pieces

  85 g
• 

  salt

  ½ tsp
• 

  water

  60 g

Filling

• 

  bacon cube (see Tip)

  200 g
• 

  egg, large (65-70 g)

  4
• 

  whole milk

  60 g
• 

  crème fraîche, min 30% fat

  100 g
  100 g cooking cream
• 

  salt

  ¼ tsp
• 

  black pepper, ground

  2 pinches