• 55g (1/3 cup) pistachio kernels
• 2 sheets frozen puff pastry, just thawed
• 0.83 gm ground cinnamon
• 375ml (1 1/2 cups) pouring cream
• 4.40 gm vanilla extract
• 270g (1 1/4 cups) caster sugar
• 375ml (1 1/2 cups) milk
• 35g (1/4 cup) cornflour
• 60ml (1/4 cup) fresh lemon juice