Curtis Stone's Dark Chocolate and Strawberry Tart

Ingredients

• 350 ml milk
• 2 tsp vanilla extract
• 5 egg yolks
• 30 gm cornflour
• 100 gm caster sugar
• 15 gm unsalted butter, diced
• 220 gm dark chocolate (60% cocoa solids), finely chopped
• Olive oil spray, for greasing
• 2 tsp coconut oil
• 210 gm chocolate wafer biscuits (about 35)
• 750 gm (about 3 punnets) strawberries, hulled and quartered
• 1 tbsp lemon juice
• Dark chocolate curls, to serve (optional)