• 

  Gruyère cheese or Swiss cheese (optional), cut into pieces (3 cm)

  50 g

Pastry

• 

  butter cut into pieces, plus extra for greasing

  75 g
• 

  plain flour plus extra for dusting

  150 g
• 

  salt

  ½ tsp
• 

  water

  50 g

Filling

• 

  bacon cubes

  200 g
• 

  olive oil (optional - see Tips)

  20 g
• 

  eggs

  4
• 

  milk

  50 g
• 

  crème fraîche or pouring (whipping) cream

  100 g
• 

  salt

  ¼ tsp
• 

  ground black pepper

  2 pinches