Mackarel, Potato and Beetroot Salad with horseradish dressing

2 shredded smoked mackerel, 6 diced ,peeled and boiled potatoes, 1 chopped pickled beetroot, spring onions, kidney beans and lots of fresh corriander all mixed with a dressing made of horseradish creme sauce, oilve oil, a pinch of sugar and salt, mayonnaise and lots of black pepper served with a nice crusty bread and real butter - delicious!!