Combine the coleslaw, celery, raisins and parsley in a large mixing bowl. For the dressing combine all the ingredients and taste for seasoning.
To make the brittle brown the pumpkin seeds in a non stick pan. Pour over the sugar and without stirring allow it to caramelise. Prepare a baking tray by lining with bake paper and pour over pumpkin seed mixture.
Allow to cool and break into pieces. Scatter over the salad and serve.