To make the pastry, cut the butter into two pieces of 3 ½oz / 95g and 4oz / 120g. Half the 4oz / 120g portion in two and then freeze all three portions of butter until very cold, at least 15 minutes. If you want to make a simpler dough like the way you would make pie crust, then take only 4oz of butter and cut it into small cubes then freeze it until very cold.
In a food processor, combine the flour, turmeric, salt, and sugar. Take the 3 ½oz of cold butter and cut it into cubes or small pieces. Feed it through the food processor tube while blitzing. Mix until it resembles breadcrumbs. To make the simpler version you can combine the flour, turmeric, salt and sugar in a bowl with a whisk or in the food processor. Take the 4oz of cubed chilled butter and feed it through the food processor tube while blitzing. Mix until it resembles breadcrumbs. Or if making this by hand in a bowl you can use 2 forks, a pastry cutter, or your fingers to pinch or cut the butter into the dry ingredients until it resemebles a crumble dough.
Slowly stream the cold water while blending or mix it by hand with a spoon in the bowl. It will come together as a dough, cleaning the sides of the food processor or bowl. Wrap this dough in plastic wrap and let it rest for 1 hour in the fridge. If you followed teh simpler method your dough can chill as long as you like and then it's ready to roll out and cut into circles once the filling has cooled.
Make the flavor paste by whisking together the soy suace, tomato paste, molasses, and miso in a bowl. Set aside.
To make the filling, heat oil in a large frying pan over medium heat and sweat the onions for about 5 minutes with a good pinch of salt. Add the allspice, garlic, and hot pepper and allow to soften for about 2 minutes. Add the flavor paste and cook for another 2 minutes. Add the vegan ground beef. Break it up if it comes in block form like the Beyond Meat or Impossible product and cook until it's browned and cooked through. Then deglaze the pan with boiling water. Bring to a boil, reduce the heat to a simmer, add the thyme and cook for 15 to 20 minutes until reduced. You want the mixture to be thick and saucy, so reduce further or top up with more water as needed. Season with salt and ground pepper to taste, then transfer to a bowl and allow to cool completely before adding it in the pastry.
To continue with the pastry (for the laminted method), remove the dough from the fridge after 1 hour. It's fine to leave it in there longer as well. It should be chilled so that it's firm and not too soft. Roll it on a lightly floured surface into a rectangle. Grate one of the frozen 2oz portions of butter over the top of the dough to cover. Fold over either side of the pastry rectangle to meet in the middle, sealing the edges. Then fold again in the other direction. Seal together, cover in plastic wrap and rest in the fridge for at least 30 minutes. If you are in a warm environment definitely chill your dough for much longer. Repeat the above steps again with the remaining 2oz of chilled butter.
Preheat the oven to 400°F.
Roll out the pastry on a lightly floured surface to about ¼-inch thick. Cut out as many 6-inch circles as you can. Add a heaping tablespoon of the beef and cheese filling onto one half of each circle leaving a ½-inch gap around the edge, then top with the cheese. Brush the edges with a little bit of water, fold the empty half of the pastry over the filled side and crimp or use fork prongs pressed all around the edge to seal. Repeat until you've made all the patties. Place the patties on a baking tray and brush with a little bit of nondairy milk. Bake for 20 minutes until golden brown and flaky.