Linzer torte

Berry chia jam

• 250 g strawberries, hulled
• 250 g raspberries
• 70 g raw sugar
• 1 ¼ tsp agar agar powder
• 3 tsp white chia seeds

Linzer torte

• 120 g butter, chilled and cut into pieces (3 cm), plus extra for greasing
• 100 g hazelnuts
• 100 g plain flour, plus extra for dusting
• 100 g wholemeal spelt flour
• ¾ tsp baking powder
• 2 tbsp brown sugar (see Tips)
• ½ tsp ground cinnamon
• ¼ tsp ground cloves
• ¼ tsp ground nutmeg
• 1 egg
• 1 tsp natural vanilla extract
• 2 - 3 tsp cold water