Blueberry and Mascarpone Cheesecake

Blueberry Layer

• 200 g fresh blueberries, plus extra for serving
• 25 g caster sugar
• 20 g lemon juice

Biscuit Layer

• 40 g unsalted butter, soft, plus extra for greasing
• 200 g rich tea biscuits

Filling

• 500 g mascarpone
• 380 g condensed milk
• 70 g lemon juice