Byrek me presh (leek byrek)

Instructions

1. Wash the leeks, remove the tough green part and slice the rest into thin rounds.
2. Sweat the thinly sliced onion in the olive oil for 3 minutes, then add the leeks and let them soften for 10 minutes over low heat.
3. Sprinkle with flour, stir, then leave to cool off the heat.
4. Preheat the oven to 180 °C. In a mixing bowl, combine the eggs, fromage blanc, crumbled feta, salt and pepper, then fold in the cooled leeks.
5. Melt the butter and layer three sheets of filo, brushing each with butter.
6. Spread the filling over the pastry, roll it into a spiral and arrange it as a snail in a buttered dish.
7. Brush with butter and egg yolk, then bake for 35 to 40 minutes until the top is golden.
8. Let it rest for 5 minutes, then cut into portions.