Spinach fatayer (spinach pastries) recipe

Meanwhile, for the filling, heat the oil in a saucepan over a medium heat and cook the onion for 5 mins, stirring occasionally, until starting to go translucent. Add the chopped spinach, in batches if needed, and cook for a few minutes until wilted. Stir in the sumac, lemon juice and plenty of seasoning. Remove from the heat and leave to cool.