125ml/4 fl oz veg stockor ½ veg stock cube + 125ml boiling water
30g/1oz mature cheddar cheesegrated
salt & ground black pepper to taste
a little beaten egg to glaze
Instructions
For the pastry
Put the flour and salt into a food processor and whiz briefly together to mix
Add the butter cubes and pulse briefly a dozen times or so until you have coarse crumbs
Trickle in the water continuing to pulse until the mixture resembles rough lumps and looks a bit like overcooked and dry scrambled eggs. Add only as much water as you need
Tip the clumped crumbs onto a sheet of cling film and gently squeeze together into a ball without pressing too hard
Wrap & chill in the fridge for at least 30 minutes before using
For the filling
Melt the butter with the olive oil in a heavy-based saucepan
Add the onions and celery and cook over a medium-low heat for around 10 minutes or until they are just starting to soften
Season generously with salt and freshly ground black pepper and then pour in the stock
Bring to the boil and simmer, uncovered, for around 30 minutes or until the celery is really soft and the stock has virtually all evaporated, stirring every now and then
Remove from the heat and leave to cool completely
Once the filling is cold, preheat the oven to 200ºC/400ºF/Gas mark 6
To make the pies
Get the pastry out of the fridge, divide into two - ⅓ (for the pie lids) & ⅔ (for the pie cases). Put the smaller piece back into the fridge
Divide the larger piece again into 4 equal pieces, rolling each into a ball
Wrap four small, clean, empty, straight-sided jars with cling film (I used a couple of empty Lidl Deluxe mushroom pâté jars)
In turn, put each ball of pastry onto a lightly-floured work surface and place a jar on top of the pastry
Sculpt the pastry around the jar, making sure the pastry is an even thickness all around. Make sure the bottom isn't too thick and that there are no holes in the pastry
Once you've done them all, put the pie bases in the fridge for about 20 minutes
Roll out the reserved ⅓ of pastry and, using a round cutter (slightly larger in circumference to the jar) cut out 4 circles. Make a hole in the centre of each and chill in the fridge.
Remove the pastry cases from the fridge and carefully work the jars out of the cases. If they don't come away easily, pour hot water into each jam jar to soften the pastry slightly to release them
Fill the pastry cases ⅔ of the way up with the cooked celery mixture and top each with a large pinch of grated cheese before pressing down gently and topping with a little more cheese
Remove the pastry lids from the fridge, and one by one brush the outer circumference with a little water, lay on the filled case and crimp the edges to seal
Brush each top with a little beaten egg to glaze
Put the pies on a baking tray and cook for 35-40 minutes, or until the pastry is crisp & browned on top and sides