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