Rhubarb tart Serves: 8 Ingredients For the rhubarb: 800g rhubarb, cut into 4-5cm pieces 100g golden caster sugar ½ vanilla pod, split For the sweet pastry: 200g plain flour pinch salt 90g butter 70g caster sugar 3 egg yolks For the crème patisserie: 4 egg yolks 90g caster sugar 1 tbsp plain flour 1 tbsp