1: Mix flour, cooked potatoes, olive oil, milk, yeast, and salt in a bowl.
2: Knead the dough until smooth and let it rise for an hour.
3: Shape the dough into a flat round and place it on a baking sheet.
4: Let it rise again for about 30 minutes.
5: Preheat the oven and bake the focaccia until golden brown.
