In a large saucepan, simmer the potatoes in enough water to cover until tender, about 15 minutes. Drain well.

Add the margarine to the hot potatoes. When melted, 30 to 60 seconds, mash the potatoes with a potato masher or with an electric mixer until fluffy, 2 to 3 minutes. Pour the buttermilk on the potatoes and continue mashing until texture is smooth, 2 minutes. Serve immediately.

This recipe yields 6 servings. Serving size: 1 cup.

Exchanges Per Serving: 1 1/2 Starch, 1 Fat.

Nutrition Facts: Calories 157; Calories from Fat 54; Fat 6g; Saturated Fat 1g; Cholesterol 1mg; Sodium 93mg; Dietary Fiber 2g; Sugars 3g; Protein 3g.