1. Peel and dice potatoes, cook until tender; drain, allow to cool.
2. Wash and finely shred cabbage, put into bowl.
3. Add seeded and chopped red and green peppers, slice celery, peeled and diced cucumber, chopped spring onions, potatoes and parsley; toss lightly.
4. Pour over prepared dressing; toss well.

For the Dressing:
Put all ingredients into bowl, mix well and serve.