The Frugal Girl taught me how to make the absolute best potato bread; My kids devour it like candy!  It is reprinted here for you.  But, please, go to the site at http://www.thefrugalgirl.com/2010/10/wednesday-baking-potato-bread/ where there are beautiful step by step pictures and directions.

The Frugal Girl Potato Bread
Makes 2 loaves

1½ c. warm water (can use potato cooking water)
2 pkgs. active dry yeast (2¼ tsp. each)
1 c. mashed potato, made with fresh potato or with instant potatoes
2 tbsp. sugar
2 tbsp. melted, cooled butter or oil
1 tbsp. salt
4½-6 c. all purpose flour

In a mixing bowl, combine warm water and yeast; let stand for several minutes. Stir in potato, sugar, butter, and salt; mix well. Stir in enough flour to make a soft dough.

Turn dough out onto a floured surface and knead 5-8 minutes, or until dough is smooth and elastic, adding flour as needed.

Place dough in bowl, cover, and let rise 1 hour. Punch dough down, divide in half, and shape each half into a loaf. Place in 4×8″ loaf pans, cover, and let rise 30-45 min., or until doubled.

Bake in a preheated 350° oven for 30-35 min., or until lightly browned. Cool on wire rack.