Line unpricked pastry shell with a double thickness of heavy-duty foil. Bake at 375 for 5 minutes. Remove foil; bake 5 minutes longer.
In a blender, combine the cream, eggs, butter, onion, flour, sugar and salt; cover and process until blended. Stir in corn; pour into crust. Bake for 35-40 minutes or until a knife inserted near the center comes out clean. Let stand for 10 minutes before cutting.