Beat eggs and blend in brown sugar, shortening, and prunes. Sift dry ingredients together and stir into prune mixture. Pour into a well-greased 1-quart mold, and tie waxed paper loosely over the mold to prevent water from dripping onto the pudding when it condenses on the lid of the steamer. Place mold in steamer and steam for 1 hour or until pudding tests done. Unmold, and serve hot with choice of Hard Sauce or Foamy Sauce.