Milk tart

Base

• 120 g unsalted butter, chilled and cut into pieces (3-4 cm), plus extra for greasing
• 1 egg
• 100 g caster sugar
• 180 g self-raising flour

Filling

• 1 cinnamon quill
• 800 g full cream milk
• 4 eggs
• 40 g plain flour
• 40 g cornflour
• 200 g white sugar
• 1 tbsp natural vanilla extract
• 30 g unsalted butter
• 2 ½ tsp cinnamon sugar (see Tips)