The potato is the star of this comfort-food side dish, but a nonstarchy vegetable plays a surprising supporting role. The result is light and luscious. Smart Swaps: The original mashed potato recipe (serving size: 1/2 cup) had 130 calories, 8 g fat (4.7 g sat. fat, 0.3 g trans fat), 15 g carbohydrate, and 770 mg sodium. * Mashing options: Put the mixture through a ricer or a food processor for a smooth mash. Mash with a potato masher for a coarse mash. Veggie Helper: Cauliflower, which has less starch than potato, helps cut in half the carbohydrate grams in this dish. Less Fat: Fat-free