Almond shortbread biscuits

Shortbread

• 100 g white sugar
• ½ vanilla bean pod
• 200 g unsalted butter, chilled, cut into pieces (see Tips)
• 300 g plain flour, plus extra for dusting
• 2 pinches salt
• 1 egg

Almond mixture

• 70 g white sugar
• 100 g unsalted butter, cut into pieces
• 40 g apricot jam
• 200 g flaked almonds