Sweet Potato Rolls - cooking recipe

Ingredients

1 large yam
1 pkg. active dry yeast or 1 cake compressed
1 tsp. salt
3 Tbsp. sugar
1 Tbsp. butter
1 c. milk
3 1/2 to 4 1/2 c. sifted all-purpose flour

Preparation

Pare yam and cut in several pieces.
Add enough water to cover and cook until tender.
Drain, saving 1/4 cup of water in which yam was cooked.
Cool yam-water to lukewarm and dissolve the yeast in it.
Mash yam; then beat in salt, sugar and butter vigorously. Heat milk until a film shines on top; skim.
Stir into yam mixture and cool to lukewarm.
When right temperature has been reached, add the softened yeast.
Stir in flour, a cupful at a time, until dough is thick enough to knead.
Lift onto a floured board and knead until smooth and elastic.
Place in a greased bowl.
Cover with a tea towel and let rise in a warm place until double in size.
Bake in preheated oven at 425\u00b0 for 13 to 15 minutes.