Sift the flour into a bowl. Mix in the mustard powder and the crushed garlic.
Cut the butter and slowly rub into the flour. Add a little cheese now again
as you go along. Continue to combine the ingredients, adding a little cold
water at the end if necessary to get a nice lump of pastry dough.
Place the pastry in the fridge to rest for 15 minutes or so. Meanwhile
heat the oven to 200 C (400 F).
Roll out the pastry on a lightly floured board to form a square about
8 inches (16 cm) each side. With a sharp knife divide the pastry into
eighths in each direction to give 64 small squares.
Transfer the squares to a greased baking tray, arranging
the garlic bites with a little
space between them. Grind a little salt across the tops.
Bake for 10 to 15 minutes. Remove and allow to cool.
Transfer the garlic bites to an airtight container, they'll keep for a day or two.