What Thanksgiving feast side dish could be more appealing than mashed potatoes, especially made with lots of butter and cream? For a lighter version, reduce the butter amount, substitute low-fat milk and low-fat sour cream then stir in herbs for a tangy, lively finish. Buttermilk or even chicken broth is a flavorful healthy substitute for the milk. Enhance the flavor of plain mashed potatoes by mixing in herbs, sautéed sliced leeks, baby spinach leaves or a swirl of cooked butterbean puree. Check out the ideas listed below.