Cook potato.

Mash potatoes with hot milk until smooth.

Dissolve dried yeast in hot water and let it sit until frothy.

In a large bowl, combine mashed potatoes, yeast mixture, flour, and salt.

Mix all ingredients until a smooth batter forms.

Knead the dough well on a floured surface.

Place the dough in greased and floured tins.

Let the dough rise in a warm place for 6 hours.

Preheat oven to 205 degrees Celsius.

Bake for 45 minutes, or until browned on top and sounds hollow when tapped.

Alternatively, check for doneness by inserting a skewer; it should come out clean.