Cook the pumpkin
Place the prepared pumpkin cubes in a pot and cover them with water. Cook for about 20 minutes, or until completely tender and easily pierced with a fork.Drain and puree
Transfer the cooked pumpkin to a colander and drain thoroughly. Leave it for several minutes to remove as much excess water as possible. Place the drained pumpkin in a bowl, add the butter, and blend with an immersion blender until smooth. Allow the puree to cool until lukewarm.Activate the yeast
Combine the warm water, sugar, and active dry yeast in a small bowl. Stir gently and let it rest for 10 minutes, or until foamy.Make the dough
Add the flour and salt to a large mixing bowl. Pour in the activated yeast and add the pumpkin puree. Mix until a dough forms, then knead for about 8 to 10 minutes, or until smooth, soft, and elastic. Add a small amount of extra flour only if the dough is too wet to handle.First rise
Lightly oil a clean bowl and place the dough inside. Cover and leave it in a warm place for about 1 hour, or until doubled in size.Shape the rolls
Lightly grease an 11-inch (28 cm) round baking pan with butter.Transfer the risen dough to a work surface without kneading it again. Divide it into 16 equal pieces and shape each piece into a smooth ball. Arrange the balls evenly in the prepared pan.Second rise
Cover the pan with a clean kitchen towel and allow the rolls to rise for another 30 minutes, or until soft and puffy.Add the egg wash
Preheat the oven to 350°F (175°C).Whisk the egg yolk and milk together, then gently brush the mixture over the risen rolls.Bake
Bake for approximately 30 minutes, or until the Pumpkin Dinner Rolls are well risen and golden brown.Remove them from the oven and let them cool in the pan for about 10 minutes before serving.