Peel the potato and cook them until fork tender.
Meanwhile, measure the flour, sugar and salt into a mixing bowl. Make a well, and add the instant yeast*.
Mash the potatoes, while hot and add the milk. Add to the dry ingredients, and add the oil.
Using a stand-mixer (or you can mix with your hands and elbow grease), knead until the dough becomes elastic (about 5 minutes on medium speed). You want the dough to be soft, but not super sticky. Add more flour, a few tablespoons at a time if necessary.
*Otherwise, if using active dry yeast, use 1/2 cup of the milk (at lukewarm temperature), add the sugar and allow to proof for at least 10 minutes, until foamy.
Cover loosely and allow to rise for 1-2 hours.
Dump the dough onto a floured surface and gently knead. Again, if the dough seems too sticky, add small handfuls of dough until you can handle it without clinging to your hands.
Divide the dough, evenly, into 10-12 balls. With floured hands, press flat and them grab the edge with your fingers-- almost like shaping pizza dough.
Preheat oil until about 250F.
Carefully add one or two shaped breads and fry until golden brown on one side (1-2 minutes). With tongs, turn over and cook for 1-2 minutes.
Drain on a paper towel. While still warm, rub each bread with a fresh clove of garlic. If desired, sprinkle with a little kosher salt.