Peach Cobbler

• 1 cm ginger, fresh, peeled, cut into pieces (optional)
• 45 g sugar
• 85 g brown sugar
• ½ lemon, thin peel only, no white pith
• 600 g peaches, frozen
• 30 g all-purpose flour
• ¼ tsp cinnamon, ground
• ¼ tsp salt
• ⅛ tsp nutmeg, ground
• 60 g butter, unsalted, diced

Biscuit Topping

• 200 g all-purpose flour
• 100 g sugar
• ½ tsp salt
• 1 tsp baking powder
• 130 g Greek yoghurt, plain
• 1 egg, large
• 2 tbsp turbinado sugar
  or 2 tbsp raw cane sugar