Wash the sweet pumpkin thoroughly, remove the seeds, and steam it.
Mash the steamed sweet pumpkin.
In a bowl, combine the mashed pumpkin, bread flour, sugar, salt, yeast, milk, and butter, then knead the dough.
Let the dough rise (first proofing).
Shape the dough into small bread rolls.
Allow the dough to proof again (second proofing).
Bake in a preheated oven at 180°C (356°F) for 20 minutes.