Combine the potato, garlic (use more garlic if desired), salt, potato water, yeast, and sugar.
Stir until the yeast is dissolved and then add the flour. You will have to finish mixing this dough with your hands.
When it is thoroughly blended, brush the top of the dough with soft butter, cover, and let rise until doubled.
Punch the dough down and turn it into a well-buttered loaf pan.
Brush the top of the dough with soft butter again and let rise again.
Bake in a 375° oven until well browned and done, approximately 25 to 30 minutes.