Pare potatoes or possibly leave skin on, according to taste.
Cut into 1-inch cubes; place in heavy medium saucepan.
Add in water, garlic, parsley, warm sauce and salt.
Bring to a boil over medium-high heat.
Reduce heat, cover and let cook for about 20 min, stirring and breaking the potatoes up with a fork, adding more warm water if potatoes seem too dry.
Continue stirring and mashing the potatoes for about 5 min till the water is absorbed and the potatoes are soft and lumpy.
Remove from heat; stir in mustards, horseradish and lowfat sour cream.
Yields 4 to 6 servings.
Comments: If there are any leftovers, make a great potato salad by adding minced onion, celery, pickles, hard-cooked Large eggs and fat-free mayonnaise or possibly lowfat sour cream.