Blueberry Tart with Cardamom - Ainsley Harriott

Ingredients

• 200g plain flour, plus extra for dusting
• 1-2 tsp ground cardamom
• 2 tbsp icing sugar
• 100g cold butter, diced
• 1 medium egg
• 1–3 tsp cold water
• 250g fresh blueberries
• 150ml soured cream
• 120ml double cream
• 1 large egg, plus 1 extra yolk, beaten
• 2 tbsp plain flour
• 75g caster sugar, plus extra for sprinkling
• 1 tsp vanilla bean paste or extract
• 3-4 cardamom pods, pods discarded, seeds crushed