Prick the potatoes in several places with a fork and bake in the microwave for about 12 minutes on high. Peel the potatoes, place in a bowl, mash and let cool.
Mix the flour, half of the rosemary and salt in a food processor and mix until the rosemary is chopped. Add about a third of the cooled potatoes and mix again.
Mix warm water and sugar and sprinkle with yeast. Let stand for about 5 minutes and stir in 3 tablespoons of olive oil. With the food processor running, pour the yeast mixture onto the flour and wait until a smooth dough is formed.
Place the dough on a lightly floured surface and knead for about a minute; Dust with more flour if necessary. Put the dough in a large, oiled bowl and turn until it is completely covered with oil. Cover with kitchen towel and let rise in a warm place for about an hour until it has doubled.
Knead the dough for about 30 seconds on a surface dusted with flour, shape into a 30 cm disc and place on a lightly oiled baking sheet. Slightly dent the surface with your fingertips, brush with 1 tablespoon of olive oil and sprinkle with salt. Let rise for about 20 minutes and bake in the preheated oven for about 18 minutes at 230 ° C until the dough turns golden.