Grate the potatoes and the zest of the lemon and orange. Beat the eggs well; beat the butter and sugar till creamy, add the eggs, beat well, then add the grated Potato and spices and milk; beat all well together; add the grated zest of the orange and lemon and the molasses or cane syrup. Put the mixture in a well-buttered pan and bake slowly for about an hour. It may be served hot or cold cut in slices. It is delicious when served at luncheon cold with a glass of fresh milk.