Slice the leek and wash it very well with warm water – we don’t want any sand or grit in our pies! Drain the sliced leek well.
In a medium sized saucepan, melt the butter and sweat the leek until it is tender. Add the flour and mustard along with the diced meat.Slowly add the stock or milk stirring all the time to make a very thick saucy mixture, season this well and set it aside to cool a little.
You could make this into one large pie – but here we have gone with wee pies – so much more fun and great for a ‘piece’ if required.
Roll out the pastry to the thickness of a 50p piece on a lightly floured surface and then use cutters to cut rounds large enough for your pie rings (if you don’t have pie or crumpet rings you can form the pies in your largest pastry cutter – just make sure you’ve cut all your pastry round first! ) If you don’t have cutter large enough, use the biggest you have and leave the pastry a little thicker – then roll out a little larger to fit your rings.
Line the pie rings with pastry, fill with filling, top withmore pastry and crimp gently round the edges, remove the pie rings.
Preheat the oven to 190 degrees and then egg wash the tops of the pies, prick each one with a fork and sprinkle over a little flakey sea salt and coarsely ground black pepper.
Bake the pies in the oven until golden brown – either servewith tatties and steamed broccoli or leave to cool a little and use as you wish.