• 

  Gruyère cheese (optional) cut into pieces

  3 oz

Pastry

• 

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

  4 ½ oz
• 

  all-purpose flour plus extra to dust

  9 oz
• 

  salt

  ½ - 1 tsp
• 

  cold water

  3 oz

Filling

• 

  cubed bacon (see Tip)

  10 ½ oz
• 

  large eggs

  6
• 

  whole milk

  3 oz
• 

  crème fraîche

  5 oz
  5 oz cream
• 

  salt

  1 - 2 pinches
• 

  ground black pepper

  3 pinches