Place potatoes in a bowl and wash under cold, running water until water runs clear. Place in a medium saucepan with salt. Add enough water to generously cover. Bring to a boil, reduce to a simmer, and cook, uncovered, until soft, about 15 minutes. While potatoes are still warm, mash with a fork, in a food mill, or gently in a food processor.
In a medium saucepan, warm sour cream and butter. Fold warm sour cream mixture into potatoes, add salt and pepper to taste. Serve immediately. Garnish with cracked pepper.
CRACKED BLACK PEPPER GARNISH
Yield: 1/2 cup
In a small bowl stir all the ingredients together. Spoon over vegetables or drizzle lightly over dressed salads as a garnish.