* Place 2 1/2 pounds quartered small red potatoes in a medium saucepan. Cover with water to 3 inches above potatoes; bring to a boil. Reduce heat, and cook 15 minutes or until tender; drain. Return pan to heat. Add 2/3 cup 2% reduced-fat milk and 2 tablespoons butter to pan; cook 1 minute or until heated. Add potatoes to pan; mash with a potato masher to desired consistency. Stir in 1/3 cup sour ream, 1/4 cup chopped green onions, 1 teaspoon salt, and 1/2 teaspoon freshly ground black pepper.