Preheat the oven to 200°C/ 400°F/ gas mark 6.
Heat the oil in a large saucepan and gently sauté the shallots with a pinch of salt. When softened and translucent, stir in the rice and add the sultanas, coating it all in the oil, then add the chicken stock. Season with plenty of ground black pepper and bring to a boil. Cover, reduce the heat and simmer gently for 15 minutes, until the liquid has been absorbed and the rice is cooked. Set aside to cool.
While the rice is cooking, cut off the tough tips of the chard but keep the stalks, rinse well and chop into bite-sized pieces. Combine the chard with the cheese and eggs in a bowl, and season with salt and pepper. Add the cooled rice.
Next, thoroughly grease a 20cm/ 8-in square tin and toast the pine nuts gently in a hot, dry frying pan until golden. Remove and leave to cool slightly before adding to the chard and rice mix.
Layer 4 sheets of yufka/ filo in the greased tin to cover the base, with 2 sheets forming a layer one way, another 2 the other way (as your tin is square and the sheets are rectangular), brushing each sheet with a little melted butter as you go. Add half the filling mixture, then add another 4 sheets of pastry in the same way, brushing with melted butter again. Add the remaining filling and, finally, add a top layer of 4 pastry sheets in the same way. Trim the excess, tucking under the corners and edges as you go so you have a neat top.
Brush the top well with the beaten egg and sprinkle over the seeds. Bake for 30–35 minutes or until golden and cooked through. Leave it to rest for 10 minutes before serving.
Since sampling Oğuz’s Laz börek – to my mind the best – I went on to try many more versions, in Istanbul and much further east around the Black Sea. Klemuri, a small Black Sea lokanta on the European side of Istanbul, if you find yourself around there, also produces a great belt-busting version of this milk pudding. The black pepper adds a welcome dab of heat.
Serves 10