Focaccia without walnuts

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 cup water , 110 degrees F 1 1/4 ounces dry active yeast 1 tablespoon sugar 2 tablespoons olive oil , plus extra to oil bowl 2 1/2 cups all-purpose flour ,[...]

Dough 8 ounces potatoes 1 1/4 teaspoons yeast, active dry dried 1 1/2 cups water warm 3 3/4 cups flour, all-purpose durum 2 teaspoons salt Topping 3[...]