Preheat oven to 375°. In large bowl or plastic bag, combine white wine and salt. Add halibut fillets and marinate 30 minutes. Meanwhile, scrub potatoes with a vegetable brush under cold running water. Using a mandoline, slicer or knife, cut unpeeled potatoes into very thin slices, about 1/16 to 1/8 inch thick. Cut slices into quarters. Place slices in large bowl and add boiling water, Let stand a few minutes to precook slightly. Then drain and let cool for easier handling. Set aside.