Boil potatoes until tender. Mash them into mashed potatoes. Add the 1 cup of reserved potato water and the mashed potatoes to a large bowl, mix until well combined. Set aside to cool.

Add yeast to a small bowl with 1 tsp sugar and add the warm water. Let it sit until it foams up.

Add the sugar, melted butter, and the salt to the mashed potatoes. Stir. When the potato water mixture is cool, mix in the yeast. Add the eggs and milk, mix until well combine.

Using a stand mixer on low, add the flour one cup at a time to the potato mixture until you have a a soft slightly tacky dough. Place the dough on a floured surface and knead it about 10 minutes. Dough should be smooth and elastic.

Coat an extra large bowl with oil, place the dough in the bowl and turn to coat. Let dough rise in a warm place until doubled, covered.

Punch the dough down and knead a few minutes then divide the dough into 2 loaves. ( If making rolls divide the dough into the size rolls you want. If making bread...place the dough in greased bread pans and let rise until doubled in size, bake at 375 degrees for 30 to 40 minutes. If making rolls, place the rolls on a greased cookie sheet about 2 inches apart. Let rise until doubled, bake at 375 degrees about 20 - 25 minutes or until golden brown on top.

Brush the tops of the bread or rolls from the oven with butter, cool completely (yeah right)!