• Gruyère cheese (optional) , cut in pieces

  80 g

Pastry

• butter, unsalted , cut in pieces, plus extra for greasing

  110 g
• flour , plus extra for dusting

  230 g
• salt

  ½ - 1 tsp
• water

  75 g

Filling

• bacon cubes

  300 g
• eggs

  6
• milk

  80 g
• crème fraîche

  150 g
  150 g cream
• salt

  1 - 2 pinches
• ground black pepper

  3 pinches