• 

  Gruyère cheese (optionnel) cut into pieces

  3 ½ oz

Pastry

• 

  unsalted butter cold and cut into pieces, plus extra to grease

  6 oz
• 

  all-purpose flour plus extra to dust

  12
• 

  salt

  1 tsp
• 

  cold water

  4 oz

Filling

• 

  cubed bacon (see Tip)

  14 oz
• 

  large eggs

  8
• 

  whole milk

  4 oz
• 

  crème fraîche

  7 oz
  7 oz cream
• 

  salt

  ½ tsp
• 

  ground black pepper

  4 pinches