Cut dates and prunes into small pieces. Boil dates, prunes, raisins and water for 5 minutes. Add margarine. Mix and set aside to cool.
Preheat oven to 180 degrees C.
Mix the eggs, vanilla and nuts. Add to the fruit mixture. Sift the flour, bicarb soda and salt and add to the fruit mixture. (If you want a spicy bar add 1/2 teaspoon cinnamon and 1/4 teaspoon nutmeg to the flour.)