Wash the sweet pumpkin thoroughly and remove the seeds, then steam it.
Mash the steamed sweet pumpkin and let it cool.
In a bowl, combine the mashed sweet pumpkin, flour, sugar, milk, salt, and yeast, and knead into a dough.
Allow the dough to rise in a warm place for 1 hour.
Divide the dough into desired portions and shape into balls.
Place the dough balls on a baking pan and let them rise a second time for 20 minutes.
Bake in a preheated oven at 180°C (356°F) for 20–25 minutes.