1. In a bowl, mix the egg with the olive oil, water, flour and salt. Let the dough rest for 10 minutes.
2. In another bowl, mix the boiled potatoes with butter, salt, and pepper.
3. Divide the dough into the 4 pieces and roll it out, stuffed with prepared potatoes, cheese and salami.
4. Fry in the pan on both sides until golden, about 4-6 minutes
