Whilst the pastry is blind baking, wash, place pumpkin pieces into a baking dish. In a separate small saucepan on low heat, melt 40g butter with 1 ½ tsp Pumpkin Pie Spice.
Pour butter mixture over the pumpkin and toss to coat evenly.
Once pastry is removed from oven, set aside to cool. Then bake pumpkin for 45 minutes, until soft but not brown or crisp. Set pumpkin aside to cool.
Blitz baked pumpkin in a food processor until very smooth.
Add eggs and egg whites, one at a time, blitz. Then add sugar, remaining Pumpkin Pie Spice, milk and sour cream, blitz.
Add corn flour and a pinch of salt. Blitz together until all ingredients are evenly blended and corn flour is combined.
Pour mixture into the cooled pastry base and bake for 45-50 minutes or until the filling is set (watch for the filling to darken slightly, it is ready when it sets around the edges, with a slight jiggle in the center).
Cool completely (approximately 2 hours).
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