Focaccia With Rosemary and Olive Oil Topping

1 small potato , peeled 1 1/2 cups bread flour 1 1/2 cups unbleached all-purpose flour 2 teaspoons salt 1 tablespoon white sugar 1 (1/4 ounce) package fast[...]

1 ounce fresh yeast or 3/4 ounce active dry yeast 2 tablespoons honey or 2 tablespoons sugar 2 cups tepid water , plus a bit more 1 lb bread flour 1 lb[...]