Lemon Bars

Dough

• 1 lemon, thin peelings of skin only
• 50 g sugar
• 50 g candied lemon peel
• 20 g vanilla sugar, homemade
• 120 g unsalted butter, cold, diced
• 1 egg yolk, from medium egg
• 200 g plain flour, plus extra for dusting

Assembly

• ½ lemon, thin peelings of skin only
• 120 g sugar
• 1 egg white, from medium egg