
Peel boil and mash potato. Place milk and water in a saucepan and heat to lukewarm. Pour milk mixture into a bowl. Add sugar and sprinkle yeast on top. Set aside for 5 minutes. Sift bread flour and salt into a large bowl. Using your hands mix butter and mashed potato into flour. Pour yeast mixture into flour and mix with a wooden spoon. Place dough onto a lightly floured surface and knead for 8 - 10 minutes. Dough should become smooth. place into a greased bowl and cover with cling wrap till double in size. Punch dough down and place into a greased bread pan. Cover and leave in a warm place until dough is level with top of pan. Bake at 400 F for 45 minutes or until cooked when tested with skewer. Cool on a wire rack.