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 350 degrees F (180 degrees C).
Mix the eggs, vanilla and nuts. Add to the fruit mixture. Sift the flour, baking soda and salt and add to the fruit mixture. (If you want a spicy bar add 1/2 tsp. Cinnamon and 1/4 tsp. Nutmeg to the flour.)
Spread in 7 x 11 inch pan and bake for 25-30 minutes.