Wash the sweet pumpkin thoroughly and steam it with the skin on.
Let the cooked pumpkin cool, remove the skin, and mash it.
Combine bread flour, salt, dry yeast, mashed pumpkin, and water to knead the dough.
Let the dough rise for the first fermentation.
Shape the dough into a ball, then add the rice cake filling and cover.
Let the shaped dough rise for the second fermentation.
Score the dough a la country bread and bake in the oven.
Slice after cooling and serve.