Pressure cook the pumpkin for a whistle, grind it, and keep it aside. Add  1/2 tsp of sugar to warm milk and add the yeast to it. The yeast will rise in a few mins

In a large mixing glass bowl, add sugar, warm milk, and 1/2 cup warm pumpkin puree. Then add melted butter, yeast, and mix them well

Add the all-purpose flour little by little (1/4 cup) and mix them well until a mild sticky dough is formed. Now transfer the dough to your workspace, sprinkle some flour, and start kneading the dough for 15 mins

Place the dough in a glass bowl and cover it with a plastic wrap. Leave it in a warm place for an hour until it doubles in volume

Transfer the dough to your work space and knead it for  2 mins to remove the air bubbles. Divide the dough into 12 equal parts and roll each part into a ball. Place the balls in a baking dish and cover them with a plastic wrap. Leave it for 30 mins to rise again

Bake at 350 degrees F for 15-20 mins or until the tops are lightly browned. Brush the top of the buns with melted butter.