Preheat oven to 180°C / 350°F.
Lay flat a filo sheet on a clean and dry working surface.
Brush it with olive oil all over (lightly don't overwet the filo).
Place another filo sheet on top and brush again with olive oil.
Add the filling. On the narrow side of the sheet, place some of the filling in a 2,5-3 cm (1-1¼-inch) thick line, leaving some space on each end.
Fold each ending (to secure the filling) and start rolling the sheet upwards to form a long log.
Grease a sheet pan or oven tray with olive oil and place the rolls.
Brush each roll with olive oil on top.
Prick with a toothpick each roll a few times. This will prevent steam from forming inside and the filling from coming out of the rolls.
Bake for about 25 minutes or until Tiropita's become deep golden on top.
Cool for for 5 to 10 minutes. Then cut each roll into 2-3 long pieces.
Serve with a side salad like Horiatiki, Marinated Tomato Salad, or Beetroot Salad (beets and feta pair very well!).