Sultana, apple and custard pastries

Dough

• 1 tbsp caster sugar
• 170 g full cream milk
• 2 tsp dried instant yeast (see Tips)
• 40 g butter, softened
• 350 g baker's flour, plus extra for dusting
• 1 egg
• 1 pinch sea salt

Custard

• 30 g cornflour
• 50 g raw sugar
• 1 egg
• 160 g full cream milk

Assembly

• baker's flour, for dusting
• 90 g sultanas
• 90 g apple (approx. 1 medium apple), peeled and cut into pieces (1 cm)
• ½ tsp ground cinnamon
• full cream milk, for brushing