Until this year, Mummy made these every week in the shooting season, and very good they are too. I have just found the recipe again, so thought I'd post it here where I can find it again!
This makes a baking trayful:
slices bread, and the same weight of flour, cheese and butter. Any kind
of bread; plain flour (wholemeal is fine) and any kind of cheese, but
the stronger-tasting the better.
Whizz in food processor until
beginning to come together, knead lightly and roll out. Stamp out with
cookie cutter, bake on greased baking tray at Mark 5, 180 (fan oven) or
190 (non fan) for 15 minutes.
Edited to add: Forgot to say
you can season this with Tabasco and/or dried chilli flakes, 1/4 tsp dry
mustard powder, and a sprinkle of dried mixed herbs. And, of course,
you can scale up the quantities really easily - the idea is equal
quantities of bread, flour, butter and cheese!