This recipe is for a rich and smooth pumpkin pudding for adults, using a large 920g pumpkin purchased for 100 yen as the serving dish. Remove the seeds and pulp from the pumpkin, heat it in the microwave, and scoop out the inside to make a paste. Mix together heavy cream, milk, sugar, vanilla, and egg yolks, then strain the pudding mixture and pour it into the pumpkin shell, baking it in a water bath. The smooth and rich pudding, subtly flavored with rum, pairs perfectly with the slightly bitter caramel sauce. Any leftover pudding mixture can be baked in cups, creating a luxurious and visually appealing treat that's perfect for a home café or entertaining guests.