Spiced pumpkin pie

Ingredients

• 1/2 block store-bought sweet shortcrust pastry
• 1 kilogram pumpkin, peeled and chopped
• 10 gram butter
• 2 eggs, plus 1 yolk, lightly beaten
• 1 cup brown sugar
• 1/2 cup currants
• 1/2 teaspoon ground nutmeg
• 1 teaspoon ground cloves
• 2 teaspoon ground cinnamon, plus extra for dusting
• crème fraîche, whipped cream or yoghurt, to serve