CHEESE AND ONION FILLING RECIPES

Steps:

• First, make the pastry. Tip the flours into a medium bowl with the cayenne, onion seeds, parmesan and a generous pinch of salt. Rub in the butter until the mixture resembles breadcrumbs, then pour in half the egg and 2 tbsp cold water and bring everything together using your hands. Knead a couple of times until smooth. Flatten a third of the dough into a disc, then do the same with the remaining dough. Wrap both pastry discs and chill in the fridge for at least 30 mins. Will keep chilled for up to two days.
• Meanwhile, make the filling. Heat the butter in a saucepan over a medium heat until sizzling, then scatter in the onions, bay, thyme, a large pinch of salt and good grinding of black pepper. Stir, then cook slowly for 10 mins until the onions have cooked down and started to caramelise. Stir in the sliced potatoes, cover and cook for 8-10 mins more, stirring occasionally until the potatoes are soft and starting to break down. Stir in the cream, remove the pan from the heat and leave to cool. Once cool, remove and discard the bay, then fold in the cheese.
• Roll the smaller pastry disc out on a lightly floured surface to the size of a dinner plate and lift onto a baking sheet lined with baking parchment. Roll out the remaining pastry disc along with any offcuts to a circle about 5cm wider than the first. Spoon the filling into the middle of the smaller circle on the baking sheet, leaving a 4cm border. Brush the exposed border with some of the remaining beaten egg, then drape over the larger pastry circle. Tuck the edge around the filling to enclose it, as if making a giant ravioli. Trim the edge to neaten, then crimp with a cutlery knife handle or fork to seal. Brush the pie all over with most of the remaining beaten egg, and use any trimmings to make decorations, if you like.
• Heat the oven to 210C/190C fan/gas 7. Bake the pie for 35-40 mins until deeply golden, brushing with the rest of the beaten egg halfway through. Leave to cool on the baking sheet for at least 20 mins before cutting into wedges, or leave to cool completely and serve cold.

Steps:

• To make the pastry, sift the flour into a large bowl, then stir in the mustard powder, cayenne and 1 tsp salt. Grate the butter into the flour, dipping the end of the block in flour from time to time to prevent it from clumping. Stir the flour and butter together using a table knife, then pour in 120ml ice cold water, mix and bring together to form a dough. Flatten the dough into a disc, wrap in cling film and chill in the fridge for 1 hour.
• Meanwhile, make the filling. Cook the potatoes in a pan of salted water until tender, then drain and steam dry for a few mins before mashing and leaving to cool. Melt the butter in a frying pan until foaming. Add the onions and a pinch of salt, and cook, stirring occasionally, over a medium heat until they’re completely soft and starting to caramelise. Add to a bowl with the potato. Once cool, stir in the thyme leaves, mustard, cheese and gherkins or pickled onions, and season to taste. Set aside.
• Line a baking tray with baking parchment. On a lightly floured surface, roll the pastry out into a large rectangle around 3mm thick. Cut the pastry into eight rectangles, then divide the filling equally between them, squashing it into a sausage shape down the long length of one side of each rectangle, leaving a 5cm gap at each end. Brush the exposed pastry with a little egg, then fold in the short sides of the rectangle and roll the empty half of pastry over the filling so that it is completely encased. Press the edge to seal it, then crimp the two shorter ends with a fork. Repeat with each roll, then transfer to the lined baking tray and chill in the fridge for 20 mins. Can be frozen at this point.
• Heat oven to 200C/180C fan/gas 6. Take the rolls out of the fridge, brush all over with the beaten egg, then scatter with the nigella seeds. Bake on the top shelf of the oven for 40 mins or until deeply golden and crisp. Serve hot or cold with your choice of sauce.