Per serving
Sablé is French for sandy, which explains the crumbly texture of these pastries - given extra crunch by the addition of polenta
diced
powder
(this is optional but does add extra crunchiness)
crumbled (it's easier to use if taken straight from the fridge)
to top the biscuits
In a large bowl, rub together the flour, butter, mustard powder, cayenne, polenta (if using), poppy seeds, stilton and a pinch of salt, using your fingers and hands, until the mixture forms a pastry dough. Knead the dough briefly until it really sticks together and is very lightly speckled with tiny bits of cheese. You can be quite heavy-handed.
On a lightly floured surface, roll the dough into a sausage shape with your hands, about 25cm long and 4cm in diameter, then wrap in cling film and chill for at least 1 hour. (The pastry can now be chilled for up to 1 week or frozen for up to 1 month. The pastry can be sliced and cooked from frozen but you need to cut it slightly thicker.)
To bake the biscuits, preheat the oven to 190C/gas 5/ fan 170C. Slice the dough into rounds just under 1cm thick. Lay the rounds a couple of centimetres apart on a baking sheet (or two, if you are cooking all the biscuits at the same time). Put a very small piece of stilton in the middle of each biscuit, then bake for 10-15 minutes, until the edges are starting to go golden and the cheese is bubbling. Leave to cool slightly before serving. The biscuits will keep for 2-3 days in an airtight tin.
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