(Can be prepared 2 hours ahead. Cover and keep at room temperature. Rewarm mashed potatoes over low heat, stirring frequently.) Serves 6 as a side-dish. Bon Appetit March 1999 R.S.V.P. Buddakan, Philadelphia PA ***I add a tablespoon of regular horseradish additionally, two cloves of garlic to the boiling potatoes (mash garlic with the potatoes) and use heavy cream instead of the whole milk. All of these are done to personal taste, but this is the recipe I use as my starting point.