Sultana, apple and custard scrolls

Dough

• 300 g full cream milk
• 60 g butter
• 2 tsp dried instant yeast or 20 g fresh yeast
• 500 g baker's flour
• 1 tsp salt
• 1 egg
• grapeseed oil, for greasing

Custard

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

Assembly

• water, for brushing
• 120 g sultanas
• 180 g apple (approx. 2 medium apples), peeled and cut into pieces (1 cm)
• ½ tsp ground cinnamon
• milk, for brushing