Sift the flour and put in a saucepan, dent the middle and fill with oil, vinegar, salt, and a little lukewarm water. Stir all the ingredients together and add as much water as needed. The dough must be soft and not sticky. Let it rest for 30 minutes. Cut into balls and spread by working the dough with the fingers. Add oil in the middle and place another layer of dough on top. Let it sit for another 20 minutes.
Open the large sheets with a rolling pin. In a saucepan, boil the spinach with a little water for a few minutes making sure it doesn’t wilt. Chop the onions and saute lightly in a little oil without turning brown, add the spinach, salt and pepper. Spread one sheet in a baking pan, sprinkle with oil, add the spinach mixture and cover with a sheet of dough.