Family Chicken Galette

Flaky Pastry

• 200 g unsalted butter, cut in pieces (1-2 cm) and frozen
• 200 g plain flour, plus extra for dusting
• 90 g water, cold
• ½ tsp fine sea salt

Caramelised Onions

• 1 garlic clove
• 20 g unsalted butter
• 110 g streaky bacon, cured and smoked, cut in strips (2 cm)
• 250 g onions, cut in eighths, layers separated
• 20 g dark brown sugar
• 20 g balsamic vinegar
• ½ tsp fine sea salt

Chicken Filling

• 600 g water
• 500 g chicken breast fillets, skinless
• 220 g sweet potato, peeled, cubed (2 cm)
• 3 sprigs fresh thyme, leaves only, plus extra for garnishing
• 1 - 2 pinches fine sea salt
• 1 - 2 pinches ground black pepper
• 150 g fresh mushrooms, quartered
• 40 g unsalted butter
• 30 g plain flour, plus extra for dusting
• 1 tsp chicken stock paste, homemade
  o bien ½ chicken stock cube (for 0.5 l), homemade
• 50 g whipping cream
• milk, for glazing