Method

1. Place the chuck steak in a large bowl, sprinkle with the flour and toss to coat.
2. Heat 1 tablespoon of the oil in a large heavy-based saucepan over a high heat and cook half the steak chunks, stirring occasionally, for about 5 minutes or until sealed. Remove from the pan, scraping any cooked-on bits from the base, and set aside. Repeat with another tablespoon oil and the remaining steak.
3. Clean the pan if necessary. Add the remaining 1 tablespoon oil, onion and shiitake mushrooms and cook over a medium-high heat, stirring occasionally, for 5 minutes or until the onion and mushrooms start to soften. Reduce the heat to medium, add the garlic and ginger and cook for a further 1 minute, stirring occasionally, or until aromatic. Return the steak to the pan with the stock, water and 1 tablespoon of the oyster sauce and bring to a simmer.
4. Reduce heat to low and simmer, covered, for 30 minutes, stirring occasionally. Uncover and then simmer for a further 30 minutes to 1 hour, stirring frequently or until the meat is tender and the liquid has reduced and thickened to a thick sauce consistency. Stir in the remaining oyster sauce, taste and adjust seasoning by adding a little more oyster sauce if necessary. Transfer the mixture to a heatproof bowl, cover and place in the fridge, stirring occasionally, until cooled to room temperature (this will take about 2 hours).
5. When ready to assemble the pies, preheat oven to 220°C (200°C fan-forced). Brush 6 x 10.5cm (base measurement) x 14cm (top measurement) metal or foil pie dishes. Unwrap the pastry discs and divide each into quarters. Shape a quarter into a disc and use a lightly floured rolling pin to roll the pastry on a lightly floured bench top into a round until about 3mm thick and about 15cm in diameter. Repeat with the remaining discs. Use an upturned pie dish to cut out pie lids from 6 of the rolled pastry rounds. Use the end of a 1cm piping nozzle or a small sharp knife to cut a small steam hole in the centre of each pie lid.
6. Gently ease the the uncut pastry discs into the pie dishes and use your fingertips to press the pastry gently into the corners without stretching it — it will overhang the dishes slightly. Divide the steak mixture between the pastry cases to fill. Place a lid over the mixture to cover each pie, brush the edge of each lid with the whisked egg and then fold the excess pastry from the bases over the top of the lids, crimping with your fingertips or pressing with a fork together to seal. Brush the top of each pie lightly with some of the remaining egg wash and sprinkle with sesame seeds.
7. Reduce the oven to 200°C (180°C fan-forced) and bake the pies in preheated oven for 45-50 minutes or until the pastry is cooked through and a deep golden. Stand the pies in the dishes for 5 minutes before turning out and serving.

Method

1. To make the poached chicken, put the chicken, carrot, celery, onion and peppercorns in a large saucepan or stockpot and add enough water to cover the chicken by about 2cm. Cover and bring to the boil over medium heat. Reduce heat to low and poach gently, covered, for 40 minutes or until just cooked though. Remove from heat and stand the chicken in the stock at room temperature for 1 hour to cool slightly. Transfer to the fridge and cool the chicken in the stock completely (this will take about 2 hours).
2. Strain the stock, discarding the solids. Return 1 litre (4 cups) stock to the saucepan and bring to the boil (see Baker’s Tips). Continue boiling the stock for a further 12-15 minutes or until reduced to 375ml (1½ cups). Set aside.
3. Remove the meat from the chicken, discarding the skin and bones. Use your fingers to shred the chicken meat, cover and place in the fridge until required.
4. Put the butter, 1 tbsp oil and leek in a medium saucepan and cook over medium-low heat, covered and stirring occasionally, for 15 minutes or until the leek is just soft. Add the rice and stir to coat in the oil. Add the 375ml (1½ cups) reduced stock and bring to the boil over high heat. Reduce the heat to the lowest possible setting, cover the saucepan with a lid, and cook gently for 10 minutes or until the stock is absorbed and the rice is almost tender. Transfer to a large bowl and place in the fridge to cool (this will take about 1 hour).
5. Meanwhile, put the silverbeet in a large saucepan, cover with a lid and cook over high heat, stirring occasionally, for 5 minutes or until wilted. Strain and cool slightly, then use your hands to squeeze out any excess moisture. Set aside.
6. To make the herbed yoghurt, combine the yoghurt, garlic and herbs in a small bowl and stir to combine. Cover and refrigerate until required.
7. Preheat the oven to 180°C (160°C fan-forced). Brush a 20cm x 30cm (base measurement) shallow slice tin with some of the melted butter.
8. When the rice has cooled, add the chicken, silverbeet, cream, olives, haloumi, parsley and thyme and stir gently to combine. Taste and season with salt and pepper.
9. Lay the filo sheets in a stack, cover with a dry tea towel and then a damp one to stop them from drying out. Take 1 sheet of filo (keeping the remaining sheets covered with the tea towels) and brush generously with the remaining olive oil. Lay another sheet on top. Continue to layer with the remaining filo to make two stacks, each with 6 sheets. Place the filo stacks widthways and slightly overlapping, into the greased tin to line, allowing the ends to overhang the top.
10. Spoon the chicken and rice mixture into the tin. Fold the overhanging filo over the top to cover. Brush top with remaining oil and sprinkle with sesame seeds.
11. Bake for 45-50 minutes or until filo is golden and crisp. Remove from oven and stand in tin for 10 minutes before transferring to a serving plate or board. Serve warm or at room temperature with the herbed yoghurt and lemon wedges.