Preheat the oven to 190C/385F/Gas 5.
Line a 23cm/9in tart case with the sweet pastry, line with baking paper and fill with baking beans or rice. Place into the oven and bake blind for 15 minutes. Remove the beans or rice and baking paper and return to the oven to bake for a further ten minutes, or until the base of the tart has become golden brown and cooked through.
Meanwhile, place the pumpkin into the top of a steamer and steam for 15-20 minutes, or until tender. Remove from the steamer and allow to cool.
Place the pumpkin into a food processor and blend to a purée.
Place the eggs and sugar into a large bowl and whisk to combine.
Add the ground almonds, cloves, cinnamon, ginger, nutmeg and single cream and whisk to combine.
Add the puréed pumpkin and stir to mix well.
Pour the pumpkin mixture into the pastry tart and place into the oven to bake for 40-45 minutes, or until the filling has set. Remove from the oven and cool for at least one hour.
For the ginger cream, place the double cream, syrup and stem ginger into a bowl and whisk until soft peaks are formed when the whisk is removed.
To serve, cut a slice of tart and place it onto a plate. Place a spoonful of ginger cream on the top, dust with icing sugar and garnish with a sprig of mint.