Name: Sweet potato pie
Prep time: 15 min
Cook time: 125 min
Yield: 4
Cuisine: American
Ingredients: 2 sweet potatoes, about 275g each; 15 digestive biscuits, finely ground; 150g dark brown sugar; 110g unsalted butter, melted; 2 large eggs; 120ml double cream; 3 tbsp plain flour; 1 tsp ground cinnamon; 1/2 tsp ground nutmeg; 1/2 tsp vanilla essence

1) Preheat the oven to 180C/Gas 4. Wrap the sweet potatoes tightly in two layers of aluminium foil and roast them in the oven until very soft, about 1 hour and 15 to 20 minutes. Remove from the oven and allow to cool.

2) In a bowl, stir the digestive biscuit crumbs and 50g of the brown sugar until well combined. Add the butter and mix until the crumbs are evenly moistened. Press firmly and evenly on the bottom and sides of a 23cm tart dish to create a crust, being sure there are no cracks. Bake in the oven for 10 minutes or until golden. Remove from the oven.

3) Meanwhile, make the filling. Unwrap the potatoes and peel them. Put the flesh into a bowl and mash well with a fork. Add the eggs, 90g of the brown sugar, the cream, flour, cinnamon, nutmeg and vanilla and whip until very smooth with a whisk. Pour the filling into the partially baked shell. Sprinkle the remaining brown sugar over top and bake in the centre of the oven until set, about 40 minutes.

4) Allow the pie to cool completely before cutting. Serve at room temperature.