Spicy Cheddar Shortbread

2 1/4 cups plain flour
250g butter
1 1/2 cups grated cheddar cheese
1/4 tsp cayenne

Place all ingredients (except 1/4 cup flour) in a food processor or blender.  Prcess using pulse until just combined.  Turn out onto a floured surface (with remaining flour) and shape into a ball. Cut in half and roll each half into a 30cmlog about 3cm diametre.  Wrap in glad wrap.  Chill until firm (about 35 mins).  Preheat oven to 200c.  Cut logs into 5cm thick rounds, place 2-3cm apart and bakefor 15-20 mins until golden - cool completely