Lemon curd easter biscuits

Biscuits

• 120 g raw sugar
• 200 g unsalted butter, cut into pieces
• 370 g plain flour, plus extra to dust
• 1 egg
• 1 tsp natural vanilla extract
• 1 pinch sea salt

Lemon curd

• 120 g sugar
• 70 g lemon juice
• 60 g unsalted butter
• 3 eggs